diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.codegen.cs
index 92d78d57b2..5b6a7f8b5e 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.codegen.cs
@@ -8,7 +8,7 @@ namespace __GeneratedComponent
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 : Microsoft.AspNetCore.Components.ComponentBase, IDisposable
+    public partial class AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 : Microsoft.AspNetCore.Components.ComponentBase, IDisposable
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.ir.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.ir.txt
index a08e83f549..98c5fca72d 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (51:2,1 [17] ) - System.Linq
         UsingDirective - (71:3,1 [28] ) - System.Threading.Tasks
         UsingDirective - (102:4,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 - Microsoft.AspNetCore.Components.ComponentBase - IDisposable
+        ClassDeclaration -  - public partial - AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 - Microsoft.AspNetCore.Components.ComponentBase - IDisposable
             DesignTimeDirective - 
                 DirectiveToken - (12:0,12 [11] BasicComponent.cshtml) - IDisposable
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.mappings.txt
index 4e620df0e8..728e0023db 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_DesignTime.mappings.txt
@@ -1,23 +1,23 @@
 Source Location: (12:0,12 [11] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |IDisposable|
-Generated Location: (641:17,0 [11] )
+Generated Location: (649:17,0 [11] )
 |IDisposable|
 
 Source Location: (38:1,13 [15] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |this.ToString()|
-Generated Location: (1240:35,13 [15] )
+Generated Location: (1248:35,13 [15] )
 |this.ToString()|
 
 Source Location: (79:3,5 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |string.Format("{0}", "Hello")|
-Generated Location: (1437:43,6 [29] )
+Generated Location: (1445:43,6 [29] )
 |string.Format("{0}", "Hello")|
 
 Source Location: (132:6,12 [37] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |
     void IDisposable.Dispose(){ }
 |
-Generated Location: (1689:52,12 [37] )
+Generated Location: (1697:52,12 [37] )
 |
     void IDisposable.Dispose(){ }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.codegen.cs
index 2059dba321..f1f8cd28b9 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.codegen.cs
@@ -9,7 +9,7 @@ namespace __GeneratedComponent
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 : Microsoft.AspNetCore.Components.ComponentBase, IDisposable
+    public partial class AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 : Microsoft.AspNetCore.Components.ComponentBase, IDisposable
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.ir.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.ir.txt
index 885d9ddd37..663160b90d 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent_Runtime.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (51:2,1 [19] ) - System.Linq
         UsingDirective - (71:3,1 [30] ) - System.Threading.Tasks
         UsingDirective - (102:4,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 - Microsoft.AspNetCore.Components.ComponentBase - IDisposable
+        ClassDeclaration -  - public partial - AspNetCore_d3c3d6059615673cb46fc4974164d61eabadb890 - Microsoft.AspNetCore.Components.ComponentBase - IDisposable
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (25:1,0 [91] BasicComponent.cshtml) - div
                     HtmlAttribute - (29:1,4 [25] BasicComponent.cshtml) -  class=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentDocumentClassifierPass.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentDocumentClassifierPass.cs
index ea13bcb6c6..d1828ca044 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentDocumentClassifierPass.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentDocumentClassifierPass.cs
@@ -81,6 +81,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Components
             @class.ClassName = computedClass;
             @class.Modifiers.Clear();
             @class.Modifiers.Add("public");
+            @class.Modifiers.Add("partial");
 
             if (FileKinds.IsComponentImport(codeDocument.GetFileKind()))
             {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/Components/ComponentDocumentClassifierPassTest.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/Components/ComponentDocumentClassifierPassTest.cs
index 25415097f0..1989a7f3e9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/Components/ComponentDocumentClassifierPassTest.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/Components/ComponentDocumentClassifierPassTest.cs
@@ -85,7 +85,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Components
 
             // Assert
             Assert.Equal($"{ComponentsApi.ComponentBase.FullTypeName}", visitor.Class.BaseType);
-            Assert.Equal(new[] { "public", }, visitor.Class.Modifiers);
+            Assert.Equal(new[] { "public", "partial" }, visitor.Class.Modifiers);
             Assert.Equal("Test", visitor.Class.ClassName);
         }
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDeclarationIntegrationTest.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDeclarationIntegrationTest.cs
index b441a86f38..94425c895b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDeclarationIntegrationTest.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentDeclarationIntegrationTest.cs
@@ -121,7 +121,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
index dee5f78f1f..7fdac946cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
index 0a5c9e6973..1776638976 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.mappings.txt
index 9886669a0c..8401222f05 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.mappings.txt
@@ -10,6 +10,6 @@ Generated Location: (436:18,0 [41] )
 
 Source Location: (94:2,19 [33] x:\dir\subdir\Test\TestComponent.cshtml)
 |async (e) => await Task.Delay(10)|
-Generated Location: (1282:38,19 [33] )
+Generated Location: (1290:38,19 [33] )
 |async (e) => await Task.Delay(10)|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
index bc969c8af6..01fb793ed4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
index 0417372324..efd5f61a5f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
index 1b311ffac3..fdcc121b0a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
@@ -10,7 +10,7 @@ Generated Location: (436:18,0 [41] )
 
 Source Location: (92:2,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1280:38,17 [7] )
+Generated Location: (1288:38,17 [7] )
 |OnClick|
 
 Source Location: (112:3,7 [89] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -20,7 +20,7 @@ Source Location: (112:3,7 [89] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1481:48,7 [89] )
+Generated Location: (1489:48,7 [89] )
 |
     Task OnClick(MouseEventArgs e) 
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
index 8d02e2b54c..dd0d3b23dd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
index bb7807ad5f..e2ee0d7c05 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.mappings.txt
index f8399b23fe..8193f7248a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.mappings.txt
@@ -10,6 +10,6 @@ Generated Location: (436:18,0 [41] )
 
 Source Location: (94:2,19 [32] x:\dir\subdir\Test\TestComponent.cshtml)
 |async () => await Task.Delay(10)|
-Generated Location: (1282:38,19 [32] )
+Generated Location: (1290:38,19 [32] )
 |async () => await Task.Delay(10)|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
index 6193a76695..2b26ceb0a9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
index e2eabc9498..121af12b51 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
index 03be8bfadf..9f295a0a35 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
@@ -10,7 +10,7 @@ Generated Location: (436:18,0 [41] )
 
 Source Location: (92:2,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1280:38,17 [7] )
+Generated Location: (1288:38,17 [7] )
 |OnClick|
 
 Source Location: (112:3,7 [73] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -20,7 +20,7 @@ Source Location: (112:3,7 [73] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1481:48,7 [73] )
+Generated Location: (1489:48,7 [73] )
 |
     Task OnClick() 
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
index 84cac0e8e8..8b87f31658 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
index ec89ce657d..0790665cfe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
index 1916b07cd6..0cf0d9f553 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (2059:48,7 [50] )
+Generated Location: (2067:48,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
index 5a00dd85eb..67d274e681 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
index 40c7a8ac25..4b85287dbf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
index b494dcb312..4951291164 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (30:0,30 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (969:25,30 [11] )
+Generated Location: (977:25,30 [11] )
 |ParentValue|
 
 Source Location: (54:1,7 [65] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
-Generated Location: (1579:43,7 [65] )
+Generated Location: (1587:43,7 [65] )
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
index 57e2130887..a8017f7f60 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
index a212e7bae1..5bc8c33a41 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
index 9ecd211b8e..86504b3c33 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1883:47,7 [50] )
+Generated Location: (1891:47,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
index 4484f1a45f..46d63a0d06 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
index 30cebd1865..de77fc3ddf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
index 25c6988086..a885821348 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "42";
 |
-Generated Location: (1883:47,7 [55] )
+Generated Location: (1891:47,7 [55] )
 |
     public string ParentValue { get; set; } = "42";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
index c8bfc0fe1a..e65799997d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
index 0268f19e3b..f8c2a5e0d4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
index 2ef0335db5..2a7ec03df2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (80:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1586:47,7 [50] )
+Generated Location: (1594:47,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
index e1f835a623..e3e80bbb44 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
index 8bd5424b6c..c2255708b6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
index febf366dee..6653660695 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (890:25,26 [11] )
+Generated Location: (898:25,26 [11] )
 |ParentValue|
 
 Source Location: (80:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1562:46,7 [50] )
+Generated Location: (1570:46,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
index 60071ceb0f..9a7f87f621 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
index 9d7522111f..9c01570bd7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
index d4819b00d3..5ad7a60815 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1762:48,7 [50] )
+Generated Location: (1770:48,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
index 35ac8c9678..fd51374f9f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
index c669dfee2b..955016a0cc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
index 28c62af7a3..5f860ae11c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (30:0,30 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (969:25,30 [11] )
+Generated Location: (977:25,30 [11] )
 |ParentValue|
 
 Source Location: (54:1,7 [65] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
-Generated Location: (1399:43,7 [65] )
+Generated Location: (1407:43,7 [65] )
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
index c8bfc0fe1a..e65799997d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
index 3c83d639da..181e137835 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
index 94cb7ac41c..f72ee7609e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1586:47,7 [50] )
+Generated Location: (1594:47,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
index e1f835a623..e3e80bbb44 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
index a212e7bae1..5bc8c33a41 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
index 1cc33f50d5..500ede1187 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (890:25,26 [11] )
+Generated Location: (898:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1562:46,7 [50] )
+Generated Location: (1570:46,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
index 49a81abc8a..edbbbd509d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
index 50706736a0..28774dd004 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
index bc42633054..66be5b3944 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (978:25,26 [11] )
+Generated Location: (986:25,26 [11] )
 |ParentValue|
 
 Source Location: (50:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "42";
 |
-Generated Location: (1586:47,7 [55] )
+Generated Location: (1594:47,7 [55] )
 |
     public string ParentValue { get; set; } = "42";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
index 555897d252..83a8fd2a31 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
index 6f9c65d90c..6011905aba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
index 8354f5d085..18c001cfab 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (24:0,24 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (977:25,24 [11] )
+Generated Location: (985:25,24 [11] )
 |person.Name|
 
 Source Location: (57:3,1 [37] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     Person person = new Person();
 |
-Generated Location: (1578:47,1 [37] )
+Generated Location: (1586:47,1 [37] )
 |
     Person person = new Person();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
index 3cf27c8dbc..56711a817d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
index 657741b08e..704d05beba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [26] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
index eb604f4eb9..3b21ee4855 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
@@ -5,19 +5,19 @@ Generated Location: (320:12,0 [26] )
 
 Source Location: (48:1,19 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (1090:32,19 [11] )
+Generated Location: (1098:32,19 [11] )
 |ParentValue|
 
 Source Location: (111:1,82 [28] x:\dir\subdir\Test\TestComponent.cshtml)
 |CultureInfo.InvariantCulture|
-Generated Location: (1330:40,82 [28] )
+Generated Location: (1338:40,82 [28] )
 |CultureInfo.InvariantCulture|
 
 Source Location: (152:2,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1731:51,7 [55] )
+Generated Location: (1739:51,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
index 2ad7e8ca39..ef334675df 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
index 8af89adba4..f32d667aba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
index 80054575f7..fcb9120c38 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (33:0,33 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (955:25,33 [11] )
+Generated Location: (963:25,33 [11] )
 |CurrentDate|
 
 Source Location: (113:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1334:36,7 [77] )
+Generated Location: (1342:36,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
index 2f9f73f9f3..0e0321cc17 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
index c2bffe88ef..86d7d5524e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
index d491685d6e..3e46ea8e60 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (33:0,33 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (955:25,33 [11] )
+Generated Location: (963:25,33 [11] )
 |ParentValue|
 
 Source Location: (86:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1300:36,7 [50] )
+Generated Location: (1308:36,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
index 6c72cf50ff..599ea3cbcc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
index d55cce1b12..8adadb919e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [26] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
index d647010517..c4c65bc4c4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
@@ -5,19 +5,19 @@ Generated Location: (320:12,0 [26] )
 
 Source Location: (48:1,19 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (1090:32,19 [11] )
+Generated Location: (1098:32,19 [11] )
 |ParentValue|
 
 Source Location: (115:1,86 [28] x:\dir\subdir\Test\TestComponent.cshtml)
 |CultureInfo.InvariantCulture|
-Generated Location: (1334:40,86 [28] )
+Generated Location: (1342:40,86 [28] )
 |CultureInfo.InvariantCulture|
 
 Source Location: (156:2,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1735:51,7 [55] )
+Generated Location: (1743:51,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
index d132d64692..d2529bca65 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
index 0d17a3b15d..3cf26978c5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
index b90f2ba46c..2761bdc878 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (19:0,19 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (941:25,19 [11] )
+Generated Location: (949:25,19 [11] )
 |ParentValue|
 
 Source Location: (76:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1286:36,7 [55] )
+Generated Location: (1294:36,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
index d132d64692..d2529bca65 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
index 13e4603f0c..3cd18bc247 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
index b9f8a07075..853d8f12d1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (19:0,19 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (941:25,19 [11] )
+Generated Location: (949:25,19 [11] )
 |ParentValue|
 
 Source Location: (43:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1286:36,7 [55] )
+Generated Location: (1294:36,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
index 58e2c3ead9..a5ad6630ce 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
index 3d5a20a277..44d7a5fc47 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
index 10c2355493..7940b19c98 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (18:0,18 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (940:25,18 [11] )
+Generated Location: (948:25,18 [11] )
 |ParentValue|
 
 Source Location: (42:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1285:36,7 [55] )
+Generated Location: (1293:36,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
index 1f93482650..e4e400a97b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
index 4e0a9b45d9..749907c9dc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
index 714d158f92..96607846e1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (13:0,13 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (935:25,13 [11] )
+Generated Location: (943:25,13 [11] )
 |ParentValue|
 
 Source Location: (37:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1280:36,7 [55] )
+Generated Location: (1288:36,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
index 6d964a9648..1bdb445896 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
index bd3a07f1da..7798c2595b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [26] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
index 38458c0f94..ba0aa7055a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [26] )
 
 Source Location: (64:1,35 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (1106:32,35 [11] )
+Generated Location: (1114:32,35 [11] )
 |ParentValue|
 
 Source Location: (121:2,7 [44] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; }
 |
-Generated Location: (1451:43,7 [44] )
+Generated Location: (1459:43,7 [44] )
 |
     public int ParentValue { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
index cb84e6838b..f46994a9fa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
index 87417806aa..9cfbed5187 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [26] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
index 72f36493d0..633a0cbb9f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
@@ -5,19 +5,19 @@ Generated Location: (320:12,0 [26] )
 
 Source Location: (64:1,35 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (1106:32,35 [11] )
+Generated Location: (1114:32,35 [11] )
 |ParentValue|
 
 Source Location: (131:1,102 [26] x:\dir\subdir\Test\TestComponent.cshtml)
 |CultureInfo.CurrentCulture|
-Generated Location: (1366:40,102 [26] )
+Generated Location: (1374:40,102 [26] )
 |CultureInfo.CurrentCulture|
 
 Source Location: (170:2,7 [44] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; }
 |
-Generated Location: (1763:51,7 [44] )
+Generated Location: (1771:51,7 [44] )
 |
     public int ParentValue { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
index 752a6e8a4c..2ea285ae7e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
index 9cf34bf2c6..15704802ec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
index 880cdf737d..e88bfac2da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<string> header = (context) => |
-Generated Location: (846:24,2 [46] )
+Generated Location: (854:24,2 [46] )
 | RenderFragment<string> header = (context) => |
 
 Source Location: (55:0,55 [26] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLowerInvariant()|
-Generated Location: (1100:32,55 [26] )
+Generated Location: (1108:32,55 [26] )
 |context.ToLowerInvariant()|
 
 Source Location: (87:0,87 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1351:40,87 [2] )
+Generated Location: (1359:40,87 [2] )
 |; |
 
 Source Location: (113:1,21 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |header|
-Generated Location: (1582:48,21 [6] )
+Generated Location: (1590:48,21 [6] )
 |header|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
index ae565ac6c6..20374c2f49 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
index 5ec41f2891..f70171dcac 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
index 880cdf737d..e88bfac2da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<string> header = (context) => |
-Generated Location: (846:24,2 [46] )
+Generated Location: (854:24,2 [46] )
 | RenderFragment<string> header = (context) => |
 
 Source Location: (55:0,55 [26] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLowerInvariant()|
-Generated Location: (1100:32,55 [26] )
+Generated Location: (1108:32,55 [26] )
 |context.ToLowerInvariant()|
 
 Source Location: (87:0,87 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1351:40,87 [2] )
+Generated Location: (1359:40,87 [2] )
 |; |
 
 Source Location: (113:1,21 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |header|
-Generated Location: (1582:48,21 [6] )
+Generated Location: (1590:48,21 [6] )
 |header|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
index 16eb333f1b..6c54d3261d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
index 1566cc4b13..de3d230b83 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
index 8aa24d9f91..20a570652a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (31:0,31 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |Enabled|
-Generated Location: (895:25,31 [7] )
+Generated Location: (903:25,31 [7] )
 |Enabled|
 
 Source Location: (51:1,7 [41] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public bool Enabled { get; set; }
 |
-Generated Location: (1095:35,7 [41] )
+Generated Location: (1103:35,7 [41] )
 |
     public bool Enabled { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
index f1402c510f..aa5257a6a5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
index ad7a8b56eb..e88e490e4c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
index afd07bee75..8c57cdc690 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (59:1,15 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (1101:32,15 [11] )
+Generated Location: (1109:32,15 [11] )
 |CurrentDate|
 
 Source Location: (126:2,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1480:43,7 [77] )
+Generated Location: (1488:43,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
index 2c81c2ab06..b2463f4eae 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
index a36619c209..a872ec7277 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
index da2906c913..25e1ae13e4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
@@ -1,11 +1,11 @@
 Source Location: (27:0,27 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (891:25,27 [11] )
+Generated Location: (899:25,27 [11] )
 |CurrentDate|
 
 Source Location: (55:0,55 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |Format|
-Generated Location: (1114:34,55 [6] )
+Generated Location: (1122:34,55 [6] )
 |Format|
 
 Source Location: (73:1,7 [135] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -14,7 +14,7 @@ Source Location: (73:1,7 [135] x:\dir\subdir\Test\TestComponent.cshtml)
 
     public string Format { get; set; } = "MM/dd/yyyy";
 |
-Generated Location: (1313:44,7 [135] )
+Generated Location: (1321:44,7 [135] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
index 0a5479cea8..d5b835dcc7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
index 76cd88c845..bede3eb214 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
index 70ce319ca6..c294f9cc50 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (27:0,27 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (891:25,27 [11] )
+Generated Location: (899:25,27 [11] )
 |CurrentDate|
 
 Source Location: (76:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1095:35,7 [77] )
+Generated Location: (1103:35,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
index 4bec837daf..58e1e4c874 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
index ed0c4bfc67..b98622244e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
index 8138e0a4d2..ad8f3bda42 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (27:0,27 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (891:25,27 [11] )
+Generated Location: (899:25,27 [11] )
 |ParentValue|
 
 Source Location: (51:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1095:35,7 [50] )
+Generated Location: (1103:35,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
index 703bc0e0ce..039ced4101 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
index ae0fc3cd64..fa7402fb14 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
index 5d2ae4e43d..dbd883ed09 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (29:0,29 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (951:25,29 [11] )
+Generated Location: (959:25,29 [11] )
 |CurrentDate|
 
 Source Location: (78:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1476:36,7 [77] )
+Generated Location: (1484:36,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
index b15ddfef53..c00df8a132 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
index 4f650a79fa..cd3f477f92 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
index 341e1eea38..573a569aad 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (29:0,29 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (951:25,29 [11] )
+Generated Location: (959:25,29 [11] )
 |CurrentDate|
 
 Source Location: (53:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1330:36,7 [77] )
+Generated Location: (1338:36,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
index 63f4552487..7e809d5ebe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
index 6723842455..31c35a74a3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
index b443bef47e..cb9b451459 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (29:0,29 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (951:25,29 [11] )
+Generated Location: (959:25,29 [11] )
 |CurrentDate|
 
 Source Location: (78:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1340:36,7 [77] )
+Generated Location: (1348:36,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
index e88bce3b6e..839cdeee36 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
index 7d31616d54..d34118194a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
index 01aae5776f..fade921ecd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (65:1,21 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (1107:32,21 [11] )
+Generated Location: (1115:32,21 [11] )
 |CurrentDate|
 
 Source Location: (116:2,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1486:43,7 [77] )
+Generated Location: (1494:43,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
index f883f7afd9..7425d43101 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
index ef8d403731..584539acdc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
index 073152fdb4..c8df4dbee8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (21:0,21 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |CurrentDate|
-Generated Location: (943:25,21 [11] )
+Generated Location: (951:25,21 [11] )
 |CurrentDate|
 
 Source Location: (100:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1322:36,7 [77] )
+Generated Location: (1330:36,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
index 29c1053e5e..0290e9b793 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
index 9a5add6521..99d0e7ae8b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
index 876a9ff033..ec7e65c7c1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (15:0,15 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (879:25,15 [11] )
+Generated Location: (887:25,15 [11] )
 |ParentValue|
 
 Source Location: (39:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1083:35,7 [50] )
+Generated Location: (1091:35,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
index 29c1053e5e..0290e9b793 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
index ad76db6807..912ce95305 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
index 876a9ff033..ec7e65c7c1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (15:0,15 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentValue|
-Generated Location: (879:25,15 [11] )
+Generated Location: (887:25,15 [11] )
 |ParentValue|
 
 Source Location: (39:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1083:35,7 [50] )
+Generated Location: (1091:35,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
index 68a2080324..ee4e81aee3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
index 1c62ade910..906c47fb07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.mappings.txt
index 7ec03d3ee7..acd0d909a5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (890:25,19 [6] )
+Generated Location: (898:25,19 [6] )
 |string|
 
 Source Location: (34:0,34 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (1170:34,34 [4] )
+Generated Location: (1178:34,34 [4] )
 |"hi"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
index bc51fcd9ef..e622c99563 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
index 153e88860b..697027ba8b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
index 9f0f4fc7de..62fc1c0068 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (890:25,19 [6] )
+Generated Location: (898:25,19 [6] )
 |string|
 
 Source Location: (37:0,37 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Value|
-Generated Location: (1173:34,37 [5] )
+Generated Location: (1181:34,37 [5] )
 |Value|
 
 Source Location: (53:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1765:56,7 [21] )
+Generated Location: (1773:56,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
index a5df564c24..80697f0b93 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
index 7c63eb10ec..d4333e1089 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
index a3dae2375d..0fa14c3f4d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (890:25,19 [6] )
+Generated Location: (898:25,19 [6] )
 |string|
 
 Source Location: (37:0,37 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Value|
-Generated Location: (1091:34,37 [5] )
+Generated Location: (1099:34,37 [5] )
 |Value|
 
 Source Location: (53:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1747:55,7 [21] )
+Generated Location: (1755:55,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
index 4f7323a5d8..654c0915dc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
index 0dbf027145..7dcdb9e98a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
index 61ebc61d7b..3871d99abb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (38:0,38 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |18|
-Generated Location: (977:25,38 [2] )
+Generated Location: (985:25,38 [2] )
 |18|
 
 Source Location: (24:0,24 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Value|
-Generated Location: (1145:33,24 [5] )
+Generated Location: (1153:33,24 [5] )
 |Value|
 
 Source Location: (52:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1632:50,7 [21] )
+Generated Location: (1640:50,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
index b64f5abb07..05c7a07f83 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
index 8f8e5cf377..e2aaaf777e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
index 674ff91c47..522b15f143 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (24:0,24 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Value|
-Generated Location: (963:25,24 [5] )
+Generated Location: (971:25,24 [5] )
 |Value|
 
 Source Location: (57:1,24 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Value|
-Generated Location: (1421:42,24 [5] )
+Generated Location: (1429:42,24 [5] )
 |Value|
 
 Source Location: (73:2,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1816:60,7 [21] )
+Generated Location: (1824:60,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
index 749e03142d..ac68dd9c2c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
index 7f3d877c2b..ee10c3e939 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.mappings.txt
index 8a754a980e..d5c8f1708f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (890:25,19 [6] )
+Generated Location: (898:25,19 [6] )
 |string|
 
 Source Location: (34:0,34 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (1170:34,34 [4] )
+Generated Location: (1178:34,34 [4] )
 |"hi"|
 
 Source Location: (51:1,8 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1464:43,8 [17] )
+Generated Location: (1472:43,8 [17] )
 |context.ToLower()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
index d13dc319a9..b594c622c9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
index b9592300fd..4a657e5f69 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.mappings.txt
index 1f4ebd3b11..2d90d746d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
 Source Location: (38:1,8 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1144:33,8 [17] )
+Generated Location: (1152:33,8 [17] )
 |context.ToLower()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
index dcdd42885f..066b2c3328 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
index fa0a3d720e..5632e2f7a5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.mappings.txt
index 7d02d0f497..0d14de6349 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (890:25,19 [6] )
+Generated Location: (898:25,19 [6] )
 |string|
 
 Source Location: (34:0,34 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (1170:34,34 [4] )
+Generated Location: (1178:34,34 [4] )
 |"hi"|
 
 Source Location: (50:0,50 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |17|
-Generated Location: (1382:43,50 [2] )
+Generated Location: (1390:43,50 [2] )
 |17|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
index 12f3793bd4..ec2e163edf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
index 25eb275509..dc8995e56c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.mappings.txt
index 4b634587b2..32b7d596b0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
 Source Location: (37:0,37 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |17|
-Generated Location: (1143:33,37 [2] )
+Generated Location: (1151:33,37 [2] )
 |17|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
index a4f1ef9faf..33dd581cec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
index c02da938f9..0ec89fc98c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.mappings.txt
index 91992ce60b..822413c0bf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
index e3c32b785d..968a8fdfc0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
index 4bcc57c881..34c70b6497 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.mappings.txt
index a1d9146951..34863580bb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
 Source Location: (52:1,21 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |"how are you?"|
-Generated Location: (1368:41,21 [14] )
+Generated Location: (1376:41,21 [14] )
 |"how are you?"|
 
 Source Location: (93:2,21 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |"bye!"|
-Generated Location: (1786:57,21 [6] )
+Generated Location: (1794:57,21 [6] )
 |"bye!"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
index 763208227c..3b6399bae9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Rendering;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
index 898fc12d48..737f45f2ab 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [48] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Rendering
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
index 29fd9cd544..932513beb2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [48] )
 
 Source Location: (55:2,2 [34] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderChildComponent(__builder); |
-Generated Location: (1016:31,2 [34] )
+Generated Location: (1024:31,2 [34] )
 | RenderChildComponent(__builder); |
 
 Source Location: (101:4,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (101:4,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
         |
-Generated Location: (1228:40,7 [77] )
+Generated Location: (1236:40,7 [77] )
 |
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
@@ -23,7 +23,7 @@ Source Location: (193:7,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     }
 |
-Generated Location: (1741:60,23 [9] )
+Generated Location: (1749:60,23 [9] )
 |
     }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
index 3bb8afce2a..334615b4a7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.RenderTree;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
index fca1e65ac8..cb01235ab4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [49] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.RenderTree
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
index 109a769b74..ced963e356 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
@@ -8,7 +8,7 @@ Source Location: (54:1,2 [50] x:\dir\subdir\Test\TestComponent.cshtml)
     void RenderChildComponent()
     {
         |
-Generated Location: (1017:31,2 [50] )
+Generated Location: (1025:31,2 [50] )
 |
     void RenderChildComponent()
     {
@@ -18,13 +18,13 @@ Source Location: (119:4,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     }
 |
-Generated Location: (1515:51,23 [9] )
+Generated Location: (1523:51,23 [9] )
 |
     }
 |
 
 Source Location: (135:8,2 [25] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderChildComponent(); |
-Generated Location: (1646:59,2 [25] )
+Generated Location: (1654:59,2 [25] )
 | RenderChildComponent(); |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
index 7af1cd161e..ef933bc582 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
index 248bff85e3..2447c2c068 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.mappings.txt
index a013914c8f..62364faa13 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.mappings.txt
@@ -1,25 +1,25 @@
 Source Location: (20:0,20 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |string|
-Generated Location: (891:25,20 [6] )
+Generated Location: (899:25,20 [6] )
 |string|
 
 Source Location: (34:0,34 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |int|
-Generated Location: (1096:34,34 [3] )
+Generated Location: (1104:34,34 [3] )
 |int|
 
 Source Location: (46:0,46 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (1385:43,46 [4] )
+Generated Location: (1393:43,46 [4] )
 |"hi"|
 
 Source Location: (77:1,22 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1693:52,22 [17] )
+Generated Location: (1701:52,22 [17] )
 |context.ToLower()|
 
 Source Location: (158:3,3 [29] x:\dir\subdir\Test\TestComponent.cshtml)
 |System.Math.Max(0, item.Item)|
-Generated Location: (2050:62,6 [29] )
+Generated Location: (2058:62,6 [29] )
 |System.Math.Max(0, item.Item)|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
index 208c80726f..a819c8eb10 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
index 9eb3be33a1..3a74f391c9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.mappings.txt
index f426774039..6c216e161b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
 Source Location: (36:0,36 [16] x:\dir\subdir\Test\TestComponent.cshtml)
 |new List<long>()|
-Generated Location: (1142:33,36 [16] )
+Generated Location: (1150:33,36 [16] )
 |new List<long>()|
 
 Source Location: (78:1,22 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1352:41,22 [17] )
+Generated Location: (1360:41,22 [17] )
 |context.ToLower()|
 
 Source Location: (159:3,3 [29] x:\dir\subdir\Test\TestComponent.cshtml)
 |System.Math.Max(0, item.Item)|
-Generated Location: (1560:50,6 [29] )
+Generated Location: (1568:50,6 [29] )
 |System.Math.Max(0, item.Item)|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
index 4837552cab..1622bc616a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
index 9fc99566f6..a887854aba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.mappings.txt
index d71bd72c42..937416839d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (21:0,21 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (960:25,21 [4] )
+Generated Location: (968:25,21 [4] )
 |"hi"|
 
 Source Location: (50:1,20 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1156:33,20 [17] )
+Generated Location: (1164:33,20 [17] )
 |context.ToLower()|
 
 Source Location: (103:2,16 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |context|
-Generated Location: (1377:42,16 [7] )
+Generated Location: (1385:42,16 [7] )
 |context|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
index 0ac21533e2..58f8e5a3e3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
index 042b7cb159..682293c17a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
index 79da952af0..4bd3cc288d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
index b98ae09892..b76382b456 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
index 0ac21533e2..58f8e5a3e3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
index 18ae06bcf2..425da4b7c2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
index 0ac21533e2..58f8e5a3e3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
index a11869b683..c81ff937e0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
index ae88864dc8..1d2b6b3e13 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
index fcae53e045..3067b79c9a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
index b003737829..2ecb0afbb6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (923:25,23 [9] )
+Generated Location: (931:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [98] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (46:2,7 [98] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1429:45,7 [98] )
+Generated Location: (1437:45,7 [98] )
 |
     private int counter;
     private void Increment(EventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
index 24df5d5d96..8913f19f05 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
index ac003d6aa2..41770aa8f2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.mappings.txt
index 886078a3e0..5d3920f4ea 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (28:0,28 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |context|
-Generated Location: (1023:25,28 [7] )
+Generated Location: (1031:25,28 [7] )
 |context|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
index 8a92d8e5be..f7352fef5e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
index 541586f717..0eb8c4d559 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.mappings.txt
index bfc910e3cd..09902b8cbb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (31:0,31 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |42.ToString()|
-Generated Location: (984:25,31 [13] )
+Generated Location: (992:25,31 [13] )
 |42.ToString()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
index 820652633e..448b9305da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
index 0951329005..5312b07cca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.mappings.txt
index 2ffb89de20..55b338fc26 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (54:0,54 [26] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLowerInvariant()|
-Generated Location: (1072:26,54 [26] )
+Generated Location: (1080:26,54 [26] )
 |context.ToLowerInvariant()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
index a3634216a3..b1d65fb7e8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
index bf81825dc6..f8241a525f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.mappings.txt
index d146087517..1cea8aef07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (93:2,32 [23] x:\dir\subdir\Test\TestComponent.cshtml)
 |item.ToLowerInvariant()|
-Generated Location: (1047:26,32 [23] )
+Generated Location: (1055:26,32 [23] )
 |item.ToLowerInvariant()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
index a3634216a3..b1d65fb7e8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
index 0d9d741f9b..4fdd253a12 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.mappings.txt
index d146087517..1cea8aef07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (93:2,32 [23] x:\dir\subdir\Test\TestComponent.cshtml)
 |item.ToLowerInvariant()|
-Generated Location: (1047:26,32 [23] )
+Generated Location: (1055:26,32 [23] )
 |item.ToLowerInvariant()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
index 4978aae651..83643e9665 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
index 74e0e162f7..8e0345da0e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
index b7c197ca34..dd71c048d2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (24:0,24 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |e => { Increment(); }|
-Generated Location: (924:25,24 [21] )
+Generated Location: (932:25,24 [21] )
 |e => { Increment(); }|
 
 Source Location: (60:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (60:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1442:45,7 [87] )
+Generated Location: (1450:45,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
index 47210e050e..7ab834bd56 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
index 52c31f052a..b7dc70611a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.mappings.txt
index e34837f351..268dd1e139 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (55:0,55 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |43.ToString()|
-Generated Location: (942:26,55 [13] )
+Generated Location: (950:26,55 [13] )
 |43.ToString()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
index b5992d9e8a..2392c8179c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
@@ -10,7 +10,7 @@ namespace Test
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/MyPage")]
     [Microsoft.AspNetCore.Components.RouteAttribute("/AnotherRoute/{id}")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
index ae2202df8a..3041dde946 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /MyPage
         RouteAttributeExtensionNode -  - /AnotherRoute/{id}
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (6:0,6 [9] x:\dir\subdir\Test\TestComponent.cshtml) - "/MyPage"
                 DirectiveToken - (23:1,6 [20] x:\dir\subdir\Test\TestComponent.cshtml) - "/AnotherRoute/{id}"
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.mappings.txt
index 8dd4c199df..d72859c66f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (6:0,6 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/MyPage"|
-Generated Location: (713:19,37 [9] )
+Generated Location: (721:19,37 [9] )
 |"/MyPage"|
 
 Source Location: (23:1,6 [20] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/AnotherRoute/{id}"|
-Generated Location: (942:29,37 [20] )
+Generated Location: (950:29,37 [20] )
 |"/AnotherRoute/{id}"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
index 15f0710ed8..d9b6ab374e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
index 37ecb57cb6..82af84767f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.mappings.txt
index 13c6f4aba3..d0ee4d7f0c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (32:1,17 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |123|
-Generated Location: (969:25,17 [3] )
+Generated Location: (977:25,17 [3] )
 |123|
 
 Source Location: (56:2,18 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |true|
-Generated Location: (1238:34,18 [4] )
+Generated Location: (1246:34,18 [4] )
 |true|
 
 Source Location: (115:4,20 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |new SomeType()|
-Generated Location: (1532:44,20 [14] )
+Generated Location: (1540:44,20 [14] )
 |new SomeType()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
index ed63574005..e2360f9690 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
index 2ff059cf3f..bcca583ccc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
index 5cb8bc4a78..08a8a06465 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (70:1,26 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1173:32,26 [7] )
+Generated Location: (1181:32,26 [7] )
 |OnClick|
 
 Source Location: (92:3,7 [60] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Action<MouseEventArgs> OnClick { get; set; }
 |
-Generated Location: (1680:52,7 [60] )
+Generated Location: (1688:52,7 [60] )
 |
     private Action<MouseEventArgs> OnClick { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
index 4d90da0a66..803232690f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using AnotherTest;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
index 7e7c4b5c22..7a9b86a7d8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [17] x:\dir\subdir\Test\TestComponent.cshtml) - AnotherTest
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.mappings.txt
index 2facaeab6c..91b232a1f5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [17] )
 
 Source Location: (119:6,13 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |context|
-Generated Location: (1445:42,13 [7] )
+Generated Location: (1453:42,13 [7] )
 |context|
 
 Source Location: (276:12,13 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |context|
-Generated Location: (2226:69,13 [7] )
+Generated Location: (2234:69,13 [7] )
 |context|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
index dba8b3e6a1..734c541107 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
@@ -23,7 +23,7 @@ using System.Reflection;
 #line hidden
 #nullable disable
     [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
-    public class _Imports : System.Object
+    public partial class _Imports : System.Object
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
index ee3d779d11..e14e2107c9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
@@ -9,7 +9,7 @@ Document -
         UsingDirective - (21:1,1 [23] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - 
             IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
-        ClassDeclaration -  - public - _Imports - System.Object - 
+        ClassDeclaration -  - public partial - _Imports - System.Object - 
             DesignTimeDirective - 
                 DirectiveToken - (56:3,8 [10] x:\dir\subdir\Test\_Imports.razor) - MainLayout
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.mappings.txt
index 47a3c52604..1e49237c4c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentImports/_Imports.mappings.txt
@@ -10,11 +10,11 @@ Generated Location: (448:19,0 [23] )
 
 Source Location: (56:3,8 [10] x:\dir\subdir\Test\_Imports.razor)
 |MainLayout|
-Generated Location: (841:32,0 [10] )
+Generated Location: (849:32,0 [10] )
 |MainLayout|
 
 Source Location: (69:4,1 [3] x:\dir\subdir\Test\_Imports.razor)
 |Foo|
-Generated Location: (1281:49,6 [3] )
+Generated Location: (1289:49,6 [3] )
 |Foo|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
index fcccf73b5a..1e1fc9b09f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
index 9eab05c608..4a042e8416 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.mappings.txt
index 6e8856f24e..fb16c68a65 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (27:0,27 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |"very-cool"|
-Generated Location: (979:25,27 [11] )
+Generated Location: (987:25,27 [11] )
 |"very-cool"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
index fd817fd0b7..d82732a8cd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
@@ -14,7 +14,7 @@ using Microsoft.AspNetCore.Components;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent<TItem1, TItem2> : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent<TItem1, TItem2> : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
index 493a563308..c6fcff6179 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (1:0,1 [38] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase -  - TItem1, TItem2
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase -  - TItem1, TItem2
             DesignTimeDirective - 
                 DirectiveToken - (52:1,11 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem1
                 DirectiveToken - (71:2,11 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem2
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
index 626321cc28..7aeb6d9389 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
@@ -5,32 +5,32 @@ Generated Location: (276:11,0 [38] )
 
 Source Location: (52:1,11 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |TItem1|
-Generated Location: (689:23,22 [6] )
+Generated Location: (697:23,22 [6] )
 |TItem1|
 
 Source Location: (71:2,11 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |TItem2|
-Generated Location: (908:33,22 [6] )
+Generated Location: (916:33,22 [6] )
 |TItem2|
 
 Source Location: (98:5,1 [38] x:\dir\subdir\Test\TestComponent.cshtml)
 |foreach (var item2 in Items2)
 {
     |
-Generated Location: (1415:50,1 [38] )
+Generated Location: (1423:50,1 [38] )
 |foreach (var item2 in Items2)
 {
     |
 
 Source Location: (146:8,5 [19] x:\dir\subdir\Test\TestComponent.cshtml)
 |ChildContent(item2)|
-Generated Location: (1581:59,6 [19] )
+Generated Location: (1589:59,6 [19] )
 |ChildContent(item2)|
 
 Source Location: (176:9,8 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |
 }|
-Generated Location: (1732:66,8 [3] )
+Generated Location: (1740:66,8 [3] )
 |
 }|
 
@@ -40,7 +40,7 @@ Source Location: (188:11,7 [185] x:\dir\subdir\Test\TestComponent.cshtml)
     [Parameter] public List<TItem2> Items2 { get; set; }
     [Parameter] public RenderFragment<TItem2> ChildContent { get; set; }
 |
-Generated Location: (1914:76,7 [185] )
+Generated Location: (1922:76,7 [185] )
 |
     [Parameter] public TItem1 Item1 { get; set; }
     [Parameter] public List<TItem2> Items2 { get; set; }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
index de8fb88166..1d4b0a0e43 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using Foo = Test3;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
index 49b772e1d5..5af20cdaca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [32] x:\dir\subdir\Test\TestComponent.cshtml) - static Test2.SomeComponent
         UsingDirective - (36:1,1 [17] x:\dir\subdir\Test\TestComponent.cshtml) - Foo = Test3
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
index b18ce55394..89b714505e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
index d7543ebcf9..b85efa325c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.mappings.txt
index 5f5c3fccdf..5efbef1353 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (77:2,43 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |true|
-Generated Location: (1323:36,43 [4] )
+Generated Location: (1331:36,43 [4] )
 |true|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
index 090642d184..7bb86097aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
index b91de37da2..911863c1c2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.mappings.txt
index 23e9abd843..186e32d368 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (26:0,26 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |1|
-Generated Location: (978:25,26 [1] )
+Generated Location: (986:25,26 [1] )
 |1|
 
 Source Location: (59:1,26 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |2|
-Generated Location: (1554:44,26 [1] )
+Generated Location: (1562:44,26 [1] )
 |2|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
index ac01a589cf..e5d3bd9a15 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
index a874feb5e5..3e327e8aac 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [17] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [23] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (57:2,11 [8] x:\dir\subdir\Test\_Imports.razor) - New.Test
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
index 022aa82fcc..37d3a33f1e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class Counter : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class Counter : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
index 510e28febf..21b3864e33 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [17] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [23] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
-        ClassDeclaration -  - public - Counter - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - Counter - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (11:0,11 [8] Counter.razor) - New.Test
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.mappings.txt
index f0453f843a..c5dc313fbe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (11:0,11 [8] x:\dir\subdir\Test\Pages/Counter.razor)
 |New.Test|
-Generated Location: (850:31,44 [8] )
+Generated Location: (858:31,44 [8] )
 |New.Test|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
index 871aff83f5..c113cb57c5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
index 1bff96642b..3e37806580 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
index 2ccb2c7033..8c2e5fe5ea 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (14:1,1 [18] x:\dir\subdir\Test\TestComponent.cshtml)
 |if (true)
 {
     |
-Generated Location: (1144:34,1 [18] )
+Generated Location: (1152:34,1 [18] )
 |if (true)
 {
     |
@@ -10,7 +10,7 @@ Generated Location: (1144:34,1 [18] )
 Source Location: (66:3,38 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |
 }|
-Generated Location: (1322:43,38 [3] )
+Generated Location: (1330:43,38 [3] )
 |
 }|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
index f62729fa19..b0db755550 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
index fe5bbc7cc0..06a881a0e8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
index 094e0f80a8..76139301ee 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
index 8ea8d9783a..5b73a6c0a3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
index be32db415c..3353494634 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
index 53f3c595e4..be00786267 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (54:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1226:37,7 [87] )
+Generated Location: (1234:37,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
index 6b2c4db765..8a6612870d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
@@ -29,7 +29,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
index e23e80d14e..a81183d4be 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
@@ -9,7 +9,7 @@ Document -
         UsingDirective - (21:1,1 [23] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - (57:2,11 [14] x:\dir\subdir\Test\_Imports.razor)
             IntermediateToken - (57:2,11 [14] x:\dir\subdir\Test\_Imports.razor) - CSharp - [Serializable]
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (57:2,11 [14] x:\dir\subdir\Test\_Imports.razor) - [Serializable]
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
index 1ffc621022..ba4e389975 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
index 8061dce1d7..7e414f514d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
index 1f2a201d47..43458de26a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (40:0,40 [12] x:\dir\subdir\Test\TestComponent.cshtml)
 |someDate.Day|
-Generated Location: (1116:30,40 [12] )
+Generated Location: (1124:30,40 [12] )
 |someDate.Day|
 
 Source Location: (86:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private DateTime someDate = DateTime.Now;
 |
-Generated Location: (1470:47,7 [49] )
+Generated Location: (1478:47,7 [49] )
 |
     private DateTime someDate = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
index b26e07ae5f..1699f12aae 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
index 13312be860..db322fecfe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
index be1d874768..76333b9027 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (19:0,19 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |123 + 456|
-Generated Location: (1072:29,19 [9] )
+Generated Location: (1080:29,19 [9] )
 |123 + 456|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
index ba2bab42ad..0a9bcda7fb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
index 156bb74137..ed187e3370 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [10] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (24:1,11 [11] x:\dir\subdir\Test\TestComponent.cshtml) - AnotherTest
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.mappings.txt
index 084270fa26..739b232ae0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.mappings.txt
@@ -5,6 +5,6 @@ Generated Location: (327:12,0 [10] )
 
 Source Location: (24:1,11 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |AnotherTest|
-Generated Location: (719:24,44 [11] )
+Generated Location: (727:24,44 [11] )
 |AnotherTest|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
index 9fe44c8dcf..b4b4c48eab 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
index 2e4013600f..3b188dad97 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
index af797a4e3d..3b6b930545 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (40:0,40 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |myInstance|
-Generated Location: (1085:29,40 [10] )
+Generated Location: (1093:29,40 [10] )
 |myInstance|
 
 Source Location: (84:2,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (84:2,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
 |
-Generated Location: (1450:45,7 [104] )
+Generated Location: (1458:45,7 [104] )
 |
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
index aa03027573..0233eaeb4c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
index a2aae2c90d..3527fba401 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
index eceb35d3f6..46671b9c79 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (19:0,19 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |myInstance|
-Generated Location: (1041:28,19 [10] )
+Generated Location: (1049:28,19 [10] )
 |myInstance|
 
 Source Location: (108:4,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (108:4,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
 |
-Generated Location: (1406:44,7 [104] )
+Generated Location: (1414:44,7 [104] )
 |
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
index e63835fdbe..c4601ebdd3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
index 75b0855ba8..317e992fd5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
index e350d50bba..39d4db26b4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (51:0,51 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1155:26,51 [14] )
+Generated Location: (1163:26,51 [14] )
 |someAttributes|
 
 Source Location: (103:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1690:47,7 [93] )
+Generated Location: (1698:47,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
index 437aa936f8..a9f73f1b87 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
index 2c052ccece..a8a59d2237 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
index 1071f34353..cfc099e3b0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (53:0,53 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1157:26,53 [14] )
+Generated Location: (1165:26,53 [14] )
 |someAttributes|
 
 Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1692:47,7 [93] )
+Generated Location: (1700:47,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
index 2b30a0fc0c..d571e065d1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
index dcd6ec48af..608ba5264d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
index a4d068708f..4534d0e8aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (20:0,20 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |18|
-Generated Location: (959:25,20 [2] )
+Generated Location: (967:25,20 [2] )
 |18|
 
 Source Location: (39:0,39 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1142:33,39 [14] )
+Generated Location: (1150:33,39 [14] )
 |someAttributes|
 
 Source Location: (69:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1500:50,7 [93] )
+Generated Location: (1508:50,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
index d31201916b..354200c7b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
index 5413c22919..5279e9fe92 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
index e6f880d0aa..fb05948d7a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (52:0,52 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1156:26,52 [14] )
+Generated Location: (1164:26,52 [14] )
 |someAttributes|
 
 Source Location: (104:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1691:47,7 [93] )
+Generated Location: (1699:47,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
index 3243bc0179..e5f4f383e4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
@@ -17,7 +17,7 @@ using Test2;
 #nullable disable
     [Microsoft.AspNetCore.Components.RouteAttribute("/MyPage")]
     [Microsoft.AspNetCore.Components.RouteAttribute("/AnotherRoute/{id}")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
index 2a28310682..122278bd76 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
@@ -8,7 +8,7 @@ Document -
         UsingDirective - (46:2,1 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Test2
         RouteAttributeExtensionNode -  - /MyPage
         RouteAttributeExtensionNode -  - /AnotherRoute/{id}
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (6:0,6 [9] x:\dir\subdir\Test\TestComponent.cshtml) - "/MyPage"
                 DirectiveToken - (23:1,6 [20] x:\dir\subdir\Test\TestComponent.cshtml) - "/AnotherRoute/{id}"
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.mappings.txt
index d6ee48c3df..5350d38db7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [11] )
 
 Source Location: (6:0,6 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/MyPage"|
-Generated Location: (847:26,37 [9] )
+Generated Location: (855:26,37 [9] )
 |"/MyPage"|
 
 Source Location: (23:1,6 [20] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/AnotherRoute/{id}"|
-Generated Location: (1076:36,37 [20] )
+Generated Location: (1084:36,37 [20] )
 |"/AnotherRoute/{id}"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
index d60d215ff3..1f89693af5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using Test3;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
index 37a4617d8e..6f0e7a47c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Test2
         UsingDirective - (15:1,1 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Test3
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
index 6c8eb2ea9a..4ef8941320 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
index d46e2e25e2..2df363efa0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
index 5c3c63a812..65c601f948 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
@@ -2,13 +2,13 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (846:24,2 [40] )
+Generated Location: (854:24,2 [40] )
 | 
   var myValue = "Expression value";
 |
 
 Source Location: (88:3,43 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |myValue|
-Generated Location: (1069:33,43 [7] )
+Generated Location: (1077:33,43 [7] )
 |myValue|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
index 02c86e143a..848a00a4ca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
index afb6766d6a..8e623de3ad 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
index 7ec86b882d..bc4ddfe735 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
@@ -2,13 +2,13 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (846:24,2 [40] )
+Generated Location: (854:24,2 [40] )
 | 
   var myValue = "Expression value";
 |
 
 Source Location: (87:3,42 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |myValue|
-Generated Location: (1068:33,42 [7] )
+Generated Location: (1076:33,42 [7] )
 |myValue|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
index 1a7c0465eb..4e08d723a4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
index 6e788003a9..999022b95d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
index 8d0f8e9df3..4cd3b0d63f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
index 1caa937f75..f76be959fe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
index ecd295ad1c..a745b983cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (23:0,23 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |message|
-Generated Location: (976:25,23 [7] )
+Generated Location: (984:25,23 [7] )
 |message|
 
 Source Location: (48:0,48 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |message|
-Generated Location: (1278:34,48 [7] )
+Generated Location: (1286:34,48 [7] )
 |message|
 
 Source Location: (73:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2353:57,12 [30] )
+Generated Location: (2361:57,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
index 7652aed053..fe848920d5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
index 81db5db1e1..1fbb764c2f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
index 626a5a0bb8..e5c80fe12c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (31:0,31 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |(s) => {}|
-Generated Location: (1113:25,31 [9] )
+Generated Location: (1121:25,31 [9] )
 |(s) => {}|
 
 Source Location: (59:0,59 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |message|
-Generated Location: (1429:34,59 [7] )
+Generated Location: (1437:34,59 [7] )
 |message|
 
 Source Location: (84:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2504:57,12 [30] )
+Generated Location: (2512:57,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
index 8ebc97e75f..19d7562121 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
index 2c92b68993..babb3ca22b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
index 2784a10f15..4b22752f72 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (59:0,59 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |(s) => {}|
-Generated Location: (1063:25,59 [9] )
+Generated Location: (1071:25,59 [9] )
 |(s) => {}|
 
 Source Location: (29:0,29 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |message|
-Generated Location: (1348:34,29 [7] )
+Generated Location: (1356:34,29 [7] )
 |message|
 
 Source Location: (87:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2423:57,12 [30] )
+Generated Location: (2431:57,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
index a5a20e720c..55f854572c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
index 55906fb718..b88d9593c6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
index 1a7c0465eb..4e08d723a4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
index 4a74314e02..d88259351a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
index 4917950d58..f17748b1ae 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
index 2e45fac267..382c472e41 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
index 08e0539814..dd1b9fc559 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (91:2,40 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |text|
-Generated Location: (1126:32,40 [4] )
+Generated Location: (1134:32,40 [4] )
 |text|
 
 Source Location: (127:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (1455:43,12 [35] )
+Generated Location: (1463:43,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
index c57b44be65..ebe618b419 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
index b9ce8a2d6e..007176df97 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
index 1ee533154c..d651f3df3a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
index 90f5409f7a..6277ec5af2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
@@ -5,19 +5,19 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (130:2,79 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |() => {}|
-Generated Location: (1223:32,79 [8] )
+Generated Location: (1231:32,79 [8] )
 |() => {}|
 
 Source Location: (86:2,35 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |text|
-Generated Location: (1482:41,35 [4] )
+Generated Location: (1490:41,35 [4] )
 |text|
 
 Source Location: (170:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (1811:52,12 [35] )
+Generated Location: (1819:52,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
index 4917950d58..f17748b1ae 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
index 09596c8cea..006a65a075 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
index 08e0539814..dd1b9fc559 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
@@ -5,14 +5,14 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (91:2,40 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |text|
-Generated Location: (1126:32,40 [4] )
+Generated Location: (1134:32,40 [4] )
 |text|
 
 Source Location: (127:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (1455:43,12 [35] )
+Generated Location: (1463:43,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
index b562fbe334..0494d167d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
index 4bd48b0978..15410c9711 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.mappings.txt
index eb4ba33b69..a4a8de8b0c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.mappings.txt
@@ -5,6 +5,6 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (83:2,32 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |() => {}|
-Generated Location: (1179:32,32 [8] )
+Generated Location: (1187:32,32 [8] )
 |() => {}|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
index f5084c8f15..749ab79d84 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
index 571cb8412f..c8936356d9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
index 90ef6d42f7..cd15a39fdf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
index 6ef5325c98..84f9d29759 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
index 151176cd4f..69b644aa3a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (37:0,37 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |someObject|
-Generated Location: (912:25,37 [10] )
+Generated Location: (920:25,37 [10] )
 |someObject|
 
 Source Location: (95:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object someObject = new object();
 |
-Generated Location: (1116:35,7 [49] )
+Generated Location: (1124:35,7 [49] )
 |
     private object someObject = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
index b8c949ec27..6b0af75e6d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
index d3d4ec8299..3ea736f333 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
index 25deb5f4b0..429345fdf4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
@@ -1,11 +1,11 @@
 Source Location: (37:0,37 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |Min|
-Generated Location: (901:25,37 [3] )
+Generated Location: (909:25,37 [3] )
 |Min|
 
 Source Location: (49:0,49 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |someObject|
-Generated Location: (1121:34,49 [10] )
+Generated Location: (1129:34,49 [10] )
 |someObject|
 
 Source Location: (74:2,7 [109] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -14,7 +14,7 @@ Source Location: (74:2,7 [109] x:\dir\subdir\Test\TestComponent.cshtml)
 
         [Parameter] public int Min { get; set; }
     |
-Generated Location: (1325:44,7 [109] )
+Generated Location: (1333:44,7 [109] )
 |
         private object someObject = new object();
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 4d3ac61da7..126cbce953 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index c644e00e2b..60ce180b19 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 5fcd706664..a0bb647cba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (95:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object someObject = new object();
 |
-Generated Location: (900:26,7 [49] )
+Generated Location: (908:26,7 [49] )
 |
     private object someObject = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
index 51ee950d02..856fb948b6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
index 6da670c14d..1c74425cbd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
index 128fa2be26..c51736a13c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (37:0,37 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |myElem|
-Generated Location: (881:24,37 [6] )
+Generated Location: (889:24,37 [6] )
 |myElem|
 
 Source Location: (91:2,7 [128] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (91:2,7 [128] x:\dir\subdir\Test\TestComponent.cshtml)
     private Microsoft.AspNetCore.Components.ElementReference myElem;
     public void Foo() { System.GC.KeepAlive(myElem); }
 |
-Generated Location: (1126:33,7 [128] )
+Generated Location: (1134:33,7 [128] )
 |
     private Microsoft.AspNetCore.Components.ElementReference myElem;
     public void Foo() { System.GC.KeepAlive(myElem); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
index 5f22a7aec4..cd81610446 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
index 5acd58a514..40e6ecee53 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
index bf4a929596..aef5b0284f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
@@ -1,11 +1,11 @@
 Source Location: (37:0,37 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |Min|
-Generated Location: (901:25,37 [3] )
+Generated Location: (909:25,37 [3] )
 |Min|
 
 Source Location: (49:0,49 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_element|
-Generated Location: (1090:33,49 [8] )
+Generated Location: (1098:33,49 [8] )
 |_element|
 
 Source Location: (72:2,7 [164] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -15,7 +15,7 @@ Source Location: (72:2,7 [164] x:\dir\subdir\Test\TestComponent.cshtml)
         [Parameter] public int Min { get; set; }
         public void Foo() { System.GC.KeepAlive(_element); }
     |
-Generated Location: (1337:42,7 [164] )
+Generated Location: (1345:42,7 [164] )
 |
         private ElementReference _element;
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index 965abd8a50..dd06fe3e4b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
index 27d46dcac7..bd4b7a3579 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
index 4a7fee9ede..02d0c657bc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
index 745f25995e..8d64ef342f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (44:0,44 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1125:25,44 [14] )
+Generated Location: (1133:25,44 [14] )
 |someAttributes|
 
 Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1334:35,7 [93] )
+Generated Location: (1342:35,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 21eb746abd..7e93b454b1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index 6e83da6e4a..b382d4f18d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 3d403febff..dc098abcb9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (900:26,7 [93] )
+Generated Location: (908:26,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
index c46b76cf90..a6aef64d4f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
index 26b987b602..25606a8c70 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
index 8089ffd525..7fd4be80ff 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (46:0,46 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1127:25,46 [14] )
+Generated Location: (1135:25,46 [14] )
 |someAttributes|
 
 Source Location: (109:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1336:35,7 [93] )
+Generated Location: (1344:35,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
index b246c7fd8e..7612a9b225 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
index c0246900dd..42b0de041a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
index bb7f972a65..e679a6fe4f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (45:0,45 [14] x:\dir\subdir\Test\TestComponent.cshtml)
 |someAttributes|
-Generated Location: (1126:25,45 [14] )
+Generated Location: (1134:25,45 [14] )
 |someAttributes|
 
 Source Location: (107:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1335:35,7 [93] )
+Generated Location: (1343:35,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
index c652f866cb..f5a031e133 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
index de66db16f7..7de1dc47b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
index b6cb825cb3..73d3f9c36c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (68:1,24 [61] x:\dir\subdir\Test\TestComponent.cshtml)
 |EventCallback.Factory.Create<MouseEventArgs>(this, Increment)|
-Generated Location: (1344:32,24 [61] )
+Generated Location: (1352:32,24 [61] )
 |EventCallback.Factory.Create<MouseEventArgs>(this, Increment)|
 
 Source Location: (144:3,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -15,7 +15,7 @@ Source Location: (144:3,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1903:52,7 [87] )
+Generated Location: (1911:52,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
index 5353f83ed0..1d1c5bbce1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
index 4af13ee8b7..2312ffb6cd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
index e3038b601c..14559e0381 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1179:25,23 [9] )
+Generated Location: (1187:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1686:45,7 [87] )
+Generated Location: (1694:45,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
index 563d1df5ee..9c7915c284 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
index c379757ede..310c88b923 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
index 2a590e855a..a45c60c32f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (67:1,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1343:32,23 [9] )
+Generated Location: (1351:32,23 [9] )
 |Increment|
 
 Source Location: (90:3,7 [103] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -15,7 +15,7 @@ Source Location: (90:3,7 [103] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1850:52,7 [103] )
+Generated Location: (1858:52,7 [103] )
 |
     private int counter;
     private void Increment(MouseEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
index 5e157d0d73..8b89c2aa9c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
index 76cc892f7e..100ecc72d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
index 7c07f01dbd..d7564bd3b3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (67:1,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1343:32,23 [9] )
+Generated Location: (1351:32,23 [9] )
 |Increment|
 
 Source Location: (90:3,7 [139] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -16,7 +16,7 @@ Source Location: (90:3,7 [139] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1850:52,7 [139] )
+Generated Location: (1858:52,7 [139] )
 |
     private int counter;
     private Task Increment(MouseEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
index 7ab0627213..a9b555b48c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
index 20092e795c..3480729ec9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
index 080d884d11..070d3e4a80 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1179:25,23 [9] )
+Generated Location: (1187:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -11,7 +11,7 @@ Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1686:45,7 [123] )
+Generated Location: (1694:45,7 [123] )
 |
     private int counter;
     private Task Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
index 735010701d..ef9e774f85 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
index 0b15039c86..cca8a88595 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
index 88d9713f37..65f1fbac89 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (67:1,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1343:32,23 [9] )
+Generated Location: (1351:32,23 [9] )
 |Increment|
 
 Source Location: (90:3,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -15,7 +15,7 @@ Source Location: (90:3,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1850:52,7 [104] )
+Generated Location: (1858:52,7 [104] )
 |
     private int counter;
     private void Increment(ChangeEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
index 954e9007b9..0ef91b49e5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
index ef4fa09760..051f34b558 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
index 9bdd713f1a..a97950dcc0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (24:0,24 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |EventCallback.Factory.Create(this, Increment)|
-Generated Location: (1076:25,24 [45] )
+Generated Location: (1084:25,24 [45] )
 |EventCallback.Factory.Create(this, Increment)|
 
 Source Location: (84:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (84:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1619:45,7 [87] )
+Generated Location: (1627:45,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
index 5003d15f3c..9086452809 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
index 4af13ee8b7..2312ffb6cd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
index 8a1f8344d8..4635ad9daf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1075:25,23 [9] )
+Generated Location: (1083:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1582:45,7 [87] )
+Generated Location: (1590:45,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
index fa5a6c4e59..1af6ec9ac3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
index e60135c9b0..635bf3e438 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
index d04825c09f..970b250a5f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1075:25,23 [9] )
+Generated Location: (1083:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [95] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (46:2,7 [95] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1582:45,7 [95] )
+Generated Location: (1590:45,7 [95] )
 |
     private int counter;
     private void Increment(object e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
index 3afaaad32b..1e3d615141 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
index 20092e795c..3480729ec9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
index 61213c43c9..564f0e4a51 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1075:25,23 [9] )
+Generated Location: (1083:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -11,7 +11,7 @@ Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1582:45,7 [123] )
+Generated Location: (1590:45,7 [123] )
 |
     private int counter;
     private Task Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
index f070a61d20..9abf50fde5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
index 0b7403d8c3..174bc9c60c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
index 84a885f977..a3e8e761fc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (23:0,23 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |Increment|
-Generated Location: (1075:25,23 [9] )
+Generated Location: (1083:25,23 [9] )
 |Increment|
 
 Source Location: (46:2,7 [131] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -11,7 +11,7 @@ Source Location: (46:2,7 [131] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1582:45,7 [131] )
+Generated Location: (1590:45,7 [131] )
 |
     private int counter;
     private Task Increment(object e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
index 7bc79b2b01..115b73ab91 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 27e6eac9ef..f07021ed07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index fbaff0b86a..0e064de694 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 01d1037d52..e9a734f8ff 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -8,7 +8,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (1064:33,7 [47] )
+Generated Location: (1072:33,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
index faf02f910b..fc4b8e213e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
index edc13cae62..23d5ef910b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
index 4f132ed602..c999a8456c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1164:32,17 [7] )
+Generated Location: (1172:32,17 [7] )
 |OnClick|
 
 Source Location: (81:2,7 [42] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (81:2,7 [42] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(EventArgs e) {
     }
 |
-Generated Location: (1365:42,7 [42] )
+Generated Location: (1373:42,7 [42] )
 |
     void OnClick(EventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
index dc964e9b85..5fbc7cf4c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
index 0e1b27d1b9..da27753f28 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
index 49ef3dcaf6..73fed903fd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1164:32,17 [7] )
+Generated Location: (1172:32,17 [7] )
 |OnClick|
 
 Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (1365:42,7 [47] )
+Generated Location: (1373:42,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
index fca5207019..1b0cf7c3ba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
index d619245f3d..4bfbd322ac 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.mappings.txt
index 2f3e5bc613..a7672c7e36 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.mappings.txt
@@ -5,6 +5,6 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |x => { }|
-Generated Location: (1164:32,17 [8] )
+Generated Location: (1172:32,17 [8] )
 |x => { }|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
index dc964e9b85..5fbc7cf4c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
index 0e1b27d1b9..da27753f28 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
index 49ef3dcaf6..73fed903fd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1164:32,17 [7] )
+Generated Location: (1172:32,17 [7] )
 |OnClick|
 
 Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (1365:42,7 [47] )
+Generated Location: (1373:42,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
index fec5cfbd8f..ac2dab59b0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
index 3a696287ad..4017700844 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
index b60c32ad09..cb12bf8b6b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
index 2af1a8b06e..999457560a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnClick|
-Generated Location: (1164:32,17 [7] )
+Generated Location: (1172:32,17 [7] )
 |OnClick|
 
 Source Location: (81:2,7 [31] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (81:2,7 [31] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick() {
     }
 |
-Generated Location: (1365:42,7 [31] )
+Generated Location: (1373:42,7 [31] )
 |
     void OnClick() {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
index 7a6d81473c..ffe44f5995 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
index f7262ee345..178cd3ceb4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.mappings.txt
index 52a10228c8..55c29e460e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.mappings.txt
@@ -5,6 +5,6 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |() => { }|
-Generated Location: (1164:32,17 [9] )
+Generated Location: (1172:32,17 [9] )
 |() => { }|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
index df0c79a6cb..3d9855ff5a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
index 5191583e87..b7fe8d87f1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
index 7090ffb026..d3493b4c48 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
index 93f6af217c..168465ac86 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [10] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.mappings.txt
index 8584530928..95633b5f10 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [10] )
 
 Source Location: (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1091:32,19 [1] )
+Generated Location: (1099:32,19 [1] )
 |3|
 
 Source Location: (44:1,31 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |(int x) => {}|
-Generated Location: (1332:40,31 [13] )
+Generated Location: (1340:40,31 [13] )
 |(int x) => {}|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
index 32a5e149aa..de861983b3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
index 2b4c766c99..4dca9b91d0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [10] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.mappings.txt
index 458b346f18..2805c448c8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [10] )
 
 Source Location: (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1091:32,19 [1] )
+Generated Location: (1099:32,19 [1] )
 |3|
 
 Source Location: (44:1,31 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |x => {}|
-Generated Location: (1350:40,31 [7] )
+Generated Location: (1358:40,31 [7] )
 |x => {}|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
index 36d80f3477..bc13e130aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
index 2b4c766c99..4dca9b91d0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [10] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.mappings.txt
index 6db713282c..bc7bd641ec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [10] )
 
 Source Location: (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1091:32,19 [1] )
+Generated Location: (1099:32,19 [1] )
 |3|
 
 Source Location: (44:1,31 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |x => {}|
-Generated Location: (1439:40,31 [7] )
+Generated Location: (1447:40,31 [7] )
 |x => {}|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
index abeb020cc1..a28f8dce5f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
index 2b4c766c99..4dca9b91d0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [10] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.mappings.txt
index 5da6791c80..39e5dcc93a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.mappings.txt
@@ -5,11 +5,11 @@ Generated Location: (320:12,0 [10] )
 
 Source Location: (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1091:32,19 [1] )
+Generated Location: (1099:32,19 [1] )
 |3|
 
 Source Location: (44:1,31 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |x => {}|
-Generated Location: (1332:40,31 [7] )
+Generated Location: (1340:40,31 [7] )
 |x => {}|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
index b3788a98f4..863d440862 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test.Shared;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
index 94be1bdd45..54becf8a6c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [17] x:\dir\subdir\Test\TestComponent.cshtml) - Test.Shared
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
index 37ca1aa1d0..cd31dfd755 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
@@ -5,19 +5,19 @@ Generated Location: (320:12,0 [17] )
 
 Source Location: (39:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1098:32,19 [1] )
+Generated Location: (1106:32,19 [1] )
 |3|
 
 Source Location: (48:1,28 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |Hello|
-Generated Location: (1269:40,28 [5] )
+Generated Location: (1277:40,28 [5] )
 |Hello|
 
 Source Location: (68:3,7 [38] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     MyClass Hello = new MyClass();
 |
-Generated Location: (1618:57,7 [38] )
+Generated Location: (1626:57,7 [38] )
 |
     MyClass Hello = new MyClass();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
index 5b6d83a8c0..b9a60dcaf6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
index f634b69431..85fdfcc5f3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
index b7ec0ca120..c950299d31 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
@@ -1,16 +1,16 @@
 Source Location: (19:0,19 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |int|
-Generated Location: (890:25,19 [3] )
+Generated Location: (898:25,19 [3] )
 |int|
 
 Source Location: (29:0,29 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1159:34,29 [1] )
+Generated Location: (1167:34,29 [1] )
 |3|
 
 Source Location: (38:0,38 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |_my|
-Generated Location: (1491:45,38 [3] )
+Generated Location: (1499:45,38 [3] )
 |_my|
 
 Source Location: (56:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -18,7 +18,7 @@ Source Location: (56:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
 |
-Generated Location: (1856:61,7 [90] )
+Generated Location: (1864:61,7 [90] )
 |
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
index 80c6779224..3da4f72d97 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
index 2d876f125f..e6b8351e48 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
index 317c9822e4..cb113e9f9f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
@@ -1,11 +1,11 @@
 Source Location: (19:0,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (958:25,19 [1] )
+Generated Location: (966:25,19 [1] )
 |3|
 
 Source Location: (28:0,28 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |_my|
-Generated Location: (1143:33,28 [3] )
+Generated Location: (1151:33,28 [3] )
 |_my|
 
 Source Location: (46:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (46:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
 |
-Generated Location: (1516:51,7 [90] )
+Generated Location: (1524:51,7 [90] )
 |
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
index d3d98b440d..f3321b628f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
index f0f2a741c9..19086d53a7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.mappings.txt
index eed197611e..79a2ffad1b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (26:0,26 [4] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hi"|
-Generated Location: (970:25,26 [4] )
+Generated Location: (978:25,26 [4] )
 |"hi"|
 
 Source Location: (43:1,8 [17] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.ToLower()|
-Generated Location: (1154:33,8 [17] )
+Generated Location: (1162:33,8 [17] )
 |context.ToLower()|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
index 6033862880..6cc25d558a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
index 509efd2240..24235138c4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
index 9f7368292f..39638474c8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
@@ -1,23 +1,23 @@
 Source Location: (19:0,19 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |int|
-Generated Location: (890:25,19 [3] )
+Generated Location: (898:25,19 [3] )
 |int|
 
 Source Location: (29:0,29 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (1159:34,29 [1] )
+Generated Location: (1167:34,29 [1] )
 |3|
 
 Source Location: (38:0,38 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_someKey|
-Generated Location: (1522:46,38 [8] )
+Generated Location: (1530:46,38 [8] )
 |_someKey|
 
 Source Location: (61:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object _someKey = new object();
 |
-Generated Location: (1874:63,7 [47] )
+Generated Location: (1882:63,7 [47] )
 |
     private object _someKey = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
index 7f84ecedc2..2c91e55ec6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
index a834c28a2e..d6d0f25875 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
index 9093430ce1..d9ce2b95a2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (19:0,19 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |3|
-Generated Location: (958:25,19 [1] )
+Generated Location: (966:25,19 [1] )
 |3|
 
 Source Location: (28:0,28 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_someKey|
-Generated Location: (1129:33,28 [8] )
+Generated Location: (1137:33,28 [8] )
 |_someKey|
 
 Source Location: (51:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object _someKey = new object();
 |
-Generated Location: (1481:50,7 [47] )
+Generated Location: (1489:50,7 [47] )
 |
     private object _someKey = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
index 83a65c13b4..7bd71349a9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
index 632e80e8d9..b97b644059 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
index 95c444b36c..b37b592b3a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (2:0,2 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |"My value"|
-Generated Location: (850:24,6 [10] )
+Generated Location: (858:24,6 [10] )
 |"My value"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
index 5cbcb559fd..930aa172c7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
index 4edb1a8a14..8bb2192d4e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
index 6676cb0502..80e09bdef9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
@@ -14,7 +14,7 @@ using System;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
index 927fe7d9a8..f2a48c5949 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - System
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
index 8bdbb60f09..ac10a4d51c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
index 104b50853b..f6e0431c7b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
index cc263bb7da..2e6c6499c6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
@@ -2,13 +2,13 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (846:24,2 [40] )
+Generated Location: (854:24,2 [40] )
 | 
   var myValue = "Expression value";
 |
 
 Source Location: (51:3,6 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |myValue|
-Generated Location: (1012:32,6 [7] )
+Generated Location: (1020:32,6 [7] )
 |myValue|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
index 9295208389..58629a7b37 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
index 03dfd3e21f..9233c69b73 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.mappings.txt
index 3a33c2a08a..e750457279 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (55:2,14 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |"bye!"|
-Generated Location: (1124:28,14 [6] )
+Generated Location: (1132:28,14 [6] )
 |"bye!"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
index a38b595d69..b879426548 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
index 7a231f2e1a..5512d95633 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
index db6e74ad1a..5aff46ae38 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (64:2,7 [39] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public void MyEventHandler() {}
 |
-Generated Location: (1249:38,7 [39] )
+Generated Location: (1257:38,7 [39] )
 |
     public void MyEventHandler() {}
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
index af1c571a8c..b1f9770253 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
index 1fed8fe995..e43ec298e6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
index 7cef5a2c1e..c7385e1fed 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
@@ -1,25 +1,25 @@
 Source Location: (2:0,2 [54] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<Test.Context> template = (context) => |
-Generated Location: (846:24,2 [54] )
+Generated Location: (854:24,2 [54] )
 | RenderFragment<Test.Context> template = (context) => |
 
 Source Location: (63:0,63 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.Index|
-Generated Location: (1116:32,63 [13] )
+Generated Location: (1124:32,63 [13] )
 |context.Index|
 
 Source Location: (80:0,80 [22] x:\dir\subdir\Test\TestComponent.cshtml)
 |context.Item.ToLower()|
-Generated Location: (1332:39,80 [22] )
+Generated Location: (1340:39,80 [22] )
 |context.Item.ToLower()|
 
 Source Location: (107:0,107 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1599:47,107 [2] )
+Generated Location: (1607:47,107 [2] )
 |; |
 
 Source Location: (136:1,24 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |template|
-Generated Location: (1832:55,24 [8] )
+Generated Location: (1840:55,24 [8] )
 |template|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
index 7bbc4fe7a6..48f6a62cb1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
index 15e21249c8..29ce09a37f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
index 3661589ffb..6e4bdeb354 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
@@ -1,19 +1,19 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (846:24,2 [45] )
+Generated Location: (854:24,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (73:1,69 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (1226:34,69 [11] )
+Generated Location: (1234:34,69 [11] )
 |person.Name|
 
 Source Location: (93:1,89 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1799:53,89 [3] )
+Generated Location: (1807:53,89 [3] )
 |;
 |
 
@@ -24,7 +24,7 @@ Source Location: (106:3,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (1978:62,7 [76] )
+Generated Location: (1986:62,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
index b2d64c6017..4a13a2885d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
index 280e1a3345..599f28f9a7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
index 96e3449c79..6e848206cb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
@@ -1,25 +1,25 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (846:24,2 [45] )
+Generated Location: (854:24,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (73:1,69 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (1226:34,69 [11] )
+Generated Location: (1234:34,69 [11] )
 |person.Name|
 
 Source Location: (93:1,89 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1799:53,89 [3] )
+Generated Location: (1807:53,89 [3] )
 |;
 |
 
 Source Location: (116:4,2 [15] x:\dir\subdir\Test\TestComponent.cshtml)
 |"hello, world!"|
-Generated Location: (2051:61,6 [15] )
+Generated Location: (2059:61,6 [15] )
 |"hello, world!"|
 
 Source Location: (159:7,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -29,7 +29,7 @@ Source Location: (159:7,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (2425:79,7 [76] )
+Generated Location: (2433:79,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
index a6a1643d45..8eb1225746 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
index 5cdd6a65b9..cd0cb8b280 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
index 8f8fa4f40f..8a730bfcdc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (2:0,2 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<Person> template = (person) => |
-Generated Location: (846:24,2 [47] )
+Generated Location: (854:24,2 [47] )
 | RenderFragment<Person> template = (person) => |
 
 Source Location: (56:0,56 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (1102:32,56 [11] )
+Generated Location: (1110:32,56 [11] )
 |person.Name|
 
 Source Location: (73:0,73 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1324:40,73 [2] )
+Generated Location: (1332:40,73 [2] )
 |; |
 
 Source Location: (108:1,30 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |template|
-Generated Location: (1562:48,30 [8] )
+Generated Location: (1570:48,30 [8] )
 |template|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
index ba72315905..b90678dfb8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
index 34ab875be8..c6aaf81588 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
index 2f65973e87..8b7879ad5a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
@@ -1,16 +1,16 @@
 Source Location: (1:0,1 [25] x:\dir\subdir\Test\TestComponent.cshtml)
 |RenderPerson((person) => |
-Generated Location: (850:24,6 [25] )
+Generated Location: (858:24,6 [25] )
 |RenderPerson((person) => |
 
 Source Location: (33:0,33 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (997:27,33 [11] )
+Generated Location: (1005:27,33 [11] )
 |person.Name|
 
 Source Location: (50:0,50 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |)|
-Generated Location: (1064:33,0 [1] )
+Generated Location: (1072:33,0 [1] )
 |)|
 
 Source Location: (60:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -22,7 +22,7 @@ Source Location: (60:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
 
     object RenderPerson(RenderFragment<Person> p) => null;
 |
-Generated Location: (1244:42,7 [138] )
+Generated Location: (1252:42,7 [138] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
index 0f5c223833..061003e11d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
index 2640488d84..78d49e08ca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
index f839f8e262..a26def3bcb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
@@ -1,19 +1,19 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (846:24,2 [45] )
+Generated Location: (854:24,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (54:1,50 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (1094:33,50 [11] )
+Generated Location: (1102:33,50 [11] )
 |person.Name|
 
 Source Location: (71:1,67 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1310:41,67 [3] )
+Generated Location: (1318:41,67 [3] )
 |;
 |
 
@@ -24,7 +24,7 @@ Source Location: (84:3,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (1489:50,7 [76] )
+Generated Location: (1497:50,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
index 3093889906..d8d64d9fde 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
index 25517a3745..e3b4694a96 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
index 6dc660afd7..e07a94842d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
@@ -1,16 +1,16 @@
 Source Location: (2:0,2 [25] x:\dir\subdir\Test\TestComponent.cshtml)
 |RenderPerson((person) => |
-Generated Location: (850:24,6 [25] )
+Generated Location: (858:24,6 [25] )
 |RenderPerson((person) => |
 
 Source Location: (34:0,34 [11] x:\dir\subdir\Test\TestComponent.cshtml)
 |person.Name|
-Generated Location: (998:27,34 [11] )
+Generated Location: (1006:27,34 [11] )
 |person.Name|
 
 Source Location: (51:0,51 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |)|
-Generated Location: (1065:33,0 [1] )
+Generated Location: (1073:33,0 [1] )
 |)|
 
 Source Location: (62:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -22,7 +22,7 @@ Source Location: (62:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
 
     object RenderPerson(RenderFragment<Person> p) => null;
 |
-Generated Location: (1245:42,7 [138] )
+Generated Location: (1253:42,7 [138] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
index 605c196eca..ba51ff79c8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
index d062ce15dd..57fd4d2864 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
index e68b9e7c4f..b3d0981a58 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
@@ -1,15 +1,15 @@
 Source Location: (2:0,2 [27] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment template = |
-Generated Location: (846:24,2 [27] )
+Generated Location: (854:24,2 [27] )
 | RenderFragment template = |
 
 Source Location: (45:0,45 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1086:33,45 [2] )
+Generated Location: (1094:33,45 [2] )
 |; |
 
 Source Location: (72:1,22 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |template|
-Generated Location: (1252:41,22 [8] )
+Generated Location: (1260:41,22 [8] )
 |template|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
index 6495fb500f..120d5acb21 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
index f6be33ade2..aa0c0ee968 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
index d7620053b6..34753e68c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
@@ -1,18 +1,18 @@
 Source Location: (1:0,1 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |RenderPerson(|
-Generated Location: (850:24,6 [13] )
+Generated Location: (858:24,6 [13] )
 |RenderPerson(|
 
 Source Location: (28:0,28 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |)|
-Generated Location: (885:26,0 [1] )
+Generated Location: (893:26,0 [1] )
 |)|
 
 Source Location: (38:1,7 [54] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     object RenderPerson(RenderFragment p) => null;
 |
-Generated Location: (1065:35,7 [54] )
+Generated Location: (1073:35,7 [54] )
 |
     object RenderPerson(RenderFragment p) => null;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
index afa761f1ee..33825838d7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
index e0aafb2816..13c0a91675 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
index 62902491e7..0213ca9e85 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (18:0,18 [1] x:\dir\subdir\Test\TestComponent.cshtml)
 |y|
-Generated Location: (882:25,18 [1] )
+Generated Location: (890:25,18 [1] )
 |y|
 
 Source Location: (32:1,7 [24] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string y = null;
 |
-Generated Location: (1520:46,7 [24] )
+Generated Location: (1528:46,7 [24] )
 |
     string y = null;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
index d181ad3baa..4fda0dc061 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
index 842e1a2894..6a33cfef99 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
index 6f6d5c5392..6ca17d2c2c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
@@ -1,11 +1,11 @@
 Source Location: (19:0,19 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |UserName|
-Generated Location: (883:25,19 [8] )
+Generated Location: (891:25,19 [8] )
 |UserName|
 
 Source Location: (46:0,46 [12] x:\dir\subdir\Test\TestComponent.cshtml)
 |UserIsActive|
-Generated Location: (1253:35,46 [12] )
+Generated Location: (1261:35,46 [12] )
 |UserIsActive|
 
 Source Location: (73:2,7 [88] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -13,7 +13,7 @@ Source Location: (73:2,7 [88] x:\dir\subdir\Test\TestComponent.cshtml)
     public string UserName { get; set; }
     public bool UserIsActive { get; set; }
 |
-Generated Location: (1921:56,7 [88] )
+Generated Location: (1929:56,7 [88] )
 |
     public string UserName { get; set; }
     public bool UserIsActive { get; set; }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
index 020c4b2ffd..18660d6d9c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
index 622a2a9eb8..aa507e5482 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml) - "/"
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.mappings.txt
index 50ca507c80..c0fb161bf1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_772/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/"|
-Generated Location: (631:18,37 [3] )
+Generated Location: (639:18,37 [3] )
 |"/"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
index 020c4b2ffd..18660d6d9c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
index 458f772f25..9624dc31ba 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml) - "/"
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt
index 50ca507c80..c0fb161bf1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_773/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (6:0,6 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/"|
-Generated Location: (631:18,37 [3] )
+Generated Location: (639:18,37 [3] )
 |"/"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
index 2683f01037..51cbfd3b5a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
index 50d3feedf1..daebd65a52 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [41] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
index 14fb1bf510..e8bb1d649e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
@@ -5,12 +5,12 @@ Generated Location: (320:12,0 [41] )
 
 Source Location: (61:1,17 [16] x:\dir\subdir\Test\TestComponent.cshtml)
 |OnComponentHover|
-Generated Location: (1164:32,17 [16] )
+Generated Location: (1172:32,17 [16] )
 |OnComponentHover|
 
 Source Location: (99:1,55 [13] x:\dir\subdir\Test\TestComponent.cshtml)
 |ParentBgColor|
-Generated Location: (1393:41,55 [13] )
+Generated Location: (1401:41,55 [13] )
 |ParentBgColor|
 
 Source Location: (126:2,7 [130] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -21,7 +21,7 @@ Source Location: (126:2,7 [130] x:\dir\subdir\Test\TestComponent.cshtml)
     {
     }
 |
-Generated Location: (1599:51,7 [130] )
+Generated Location: (1607:51,7 [130] )
 |
     public string ParentBgColor { get; set; } = "#FFFFFF";
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
index bfc819e290..30ca542683 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
index 076898ac35..4b5f6a8517 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.RenderTree;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
index b79bd17799..d2e0e08d1a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [49] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.RenderTree
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
index 894c267cc3..34c80001e6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
@@ -9,7 +9,7 @@ Source Location: (56:2,2 [138] x:\dir\subdir\Test\TestComponent.cshtml)
     if (__builder == null) output = "Builder is null!";
     else output = "Builder is not null!";
     |
-Generated Location: (1017:31,2 [138] )
+Generated Location: (1025:31,2 [138] )
 |
     var output = string.Empty;
     if (__builder == null) output = "Builder is null!";
@@ -18,13 +18,13 @@ Generated Location: (1017:31,2 [138] )
 
 Source Location: (206:6,16 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |output|
-Generated Location: (1293:42,16 [6] )
+Generated Location: (1301:42,16 [6] )
 |output|
 
 Source Location: (216:6,26 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |
 |
-Generated Location: (1390:47,38 [2] )
+Generated Location: (1398:47,38 [2] )
 |
 |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
index f06361ba0c..ac84d0d333 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Rendering;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
index 42c3660ca5..8e3e7ef7bd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [48] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Rendering
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
index 0e616a2a32..9bd6d6d986 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
@@ -11,7 +11,7 @@ Source Location: (60:2,7 [221] x:\dir\subdir\Test\TestComponent.cshtml)
         if (__builder == null) output = "Builder is null!";
         else output = "Builder is not null!";
         |
-Generated Location: (1070:33,7 [221] )
+Generated Location: (1078:33,7 [221] )
 |
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
@@ -22,14 +22,14 @@ Generated Location: (1070:33,7 [221] )
 
 Source Location: (293:8,20 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |output|
-Generated Location: (1433:46,20 [6] )
+Generated Location: (1441:46,20 [6] )
 |output|
 
 Source Location: (303:8,30 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     }
 |
-Generated Location: (1592:53,30 [9] )
+Generated Location: (1600:53,30 [9] )
 |
     }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
index ad8aa14710..a0284c7ec0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
index 35e3f7c321..13e1c3de4c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
index 8eacd0f0e4..fd50a6b5eb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (20:2,2 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |"My value"|
-Generated Location: (850:24,6 [10] )
+Generated Location: (858:24,6 [10] )
 |"My value"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
index 28fe1e3b44..49d1e8750a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
index 35cade949f..fc0c406756 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
index b2571c3cd6..8c93eba3be 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/my/url")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
index 5f10fd43f9..c7c90f4e44 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /my/url
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
                 DirectiveToken - (24:2,6 [9] x:\dir\subdir\Test\TestComponent.cshtml) - "/my/url"
             CSharpCode - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.mappings.txt
index 33faf34d87..583d309981 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (24:2,6 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |"/my/url"|
-Generated Location: (637:18,37 [9] )
+Generated Location: (645:18,37 [9] )
 |"/my/url"|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
index cf7458ed0c..6c09e3f0cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
index 341855a002..4fdbf78ead 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
index 92ff4bb6b5..710c047fb0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
index 34f9b31b7a..3043d63824 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [17] ) - System.Linq
         UsingDirective - (73:4,1 [28] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [37] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             DesignTimeDirective - 
             CSharpCode - 
                 IntermediateToken -  - CSharp - #pragma warning disable 0414
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
index 9a0ef8f6c5..05e9ef8676 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentDesignTimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (12:0,12 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |Foo|
-Generated Location: (876:25,12 [3] )
+Generated Location: (884:25,12 [3] )
 |Foo|
 
 Source Location: (31:1,11 [29] x:\dir\subdir\Test\TestComponent.cshtml)
 |
         int Foo = 18;
     |
-Generated Location: (1076:35,11 [29] )
+Generated Location: (1084:35,11 [29] )
 |
         int Foo = 18;
     |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
index cae7bb3d7f..eab49a6045 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
index 5212899dfb..127fb7b765 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_Lambda/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [30] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (75:2,0 [57] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (92:2,17 [36] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
index c28606eb3b..5fa17a9b98 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
index 2f95161f9b..b42dd6f4fe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [30] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (75:2,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (92:2,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
index 4a18dbb4bc..e4687bd712 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_ActionEventArgs_MethodGroup/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (112:3,7 [89] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1332:43,7 [89] )
+Generated Location: (1340:43,7 [89] )
 |
     Task OnClick(MouseEventArgs e) 
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
index 6d7dd7383d..88caac3c59 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
index b624135b5a..adab7b7583 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_Lambda/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [30] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (75:2,0 [56] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (92:2,17 [35] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
index 44c19bd800..ba00b2da01 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.codegen.cs
@@ -21,7 +21,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
index a8fa8d0cef..0bfa1a3926 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [30] x:\dir\subdir\Test\TestComponent.cshtml) - System.Threading.Tasks
         UsingDirective - (32:1,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (75:2,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (92:2,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
index 4a12aaef2c..eba61f56ed 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/AsyncEventHandler_OnElement_Action_MethodGroup/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (112:3,7 [73] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1332:43,7 [73] )
+Generated Location: (1340:43,7 [73] )
 |
     Task OnClick() 
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
index 5cd6084037..55234cdba3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
index 0e5d245109..91cbc7faf6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
index d6bdff1db6..bb848b0032 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1681:32,7 [50] )
+Generated Location: (1689:32,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
index 814786e547..6e3e68877b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
index b3e91d9b99..0aab8e86f4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [45] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (30:0,30 [11] x:\dir\subdir\Test\TestComponent.cshtml) - SomeParam - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
index dc0537f1c7..36538febe3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (54:1,7 [65] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
-Generated Location: (1143:28,7 [65] )
+Generated Location: (1151:28,7 [65] )
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
index 4446948e63..3b8e29ac25 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
index ff2e3f4654..c06a89bb4d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
index be126a558b..6c56427d45 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1465:31,7 [50] )
+Generated Location: (1473:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
index e538b50f99..20888e990a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
index 743e22d318..500bc17c10 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
index 8436b299b5..14cb2239dc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_EventCallback_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "42";
 |
-Generated Location: (1465:31,7 [55] )
+Generated Location: (1473:31,7 [55] )
 |
     public string ParentValue { get; set; } = "42";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
index 30a38342d4..905a27f074 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
index 9e326bc91b..919df85e19 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [71] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
index aa6d34cc88..d9080bb10a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (80:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1165:31,7 [50] )
+Generated Location: (1173:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
index f335bf5a5f..57819b41eb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
index b486ac5e19..a315ac1d07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [71] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
index 370629cb01..6dd6701c76 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndChangeEvent_WithoutMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (80:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1155:31,7 [50] )
+Generated Location: (1163:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
index 032d60eb93..a5f326dc6f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
index 3550f88eb5..213251c8b9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
index 7c171fc52e..91e202afd7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1384:32,7 [50] )
+Generated Location: (1392:32,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
index 37549da1d7..2e83f7e80a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
index 1c009d6652..b1a439ad32 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [45] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (30:0,30 [11] x:\dir\subdir\Test\TestComponent.cshtml) - SomeParam - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
index 7edbda14cc..a7b081890e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValueAndExpression_Generic/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (54:1,7 [65] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
-Generated Location: (963:28,7 [65] )
+Generated Location: (971:28,7 [65] )
 |
     public DateTime ParentValue { get; set; } = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
index 7fb0afa274..cc197ea8ca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
index 7c554e3b6d..bf2c911a81 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
index 56e7bb69bf..7a3e31de98 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1168:31,7 [50] )
+Generated Location: (1176:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
index fdd9b14c6d..8c314dfe8d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
index ff2e3f4654..c06a89bb4d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
index 15b74739f3..912a736913 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_SpecifiesValue_WithoutMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1158:31,7 [50] )
+Generated Location: (1166:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
index 08d517b75d..e842e725c4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
index c17544f755..af14d603b1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
index 5fbe3fefa3..3cf7ba4a3b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_TypeChecked_WithMatchingProperties/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (50:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "42";
 |
-Generated Location: (1168:31,7 [55] )
+Generated Location: (1176:31,7 [55] )
 |
     public string ParentValue { get; set; } = "42";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
index 6d07521a8d..23d0b99cc1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
index e92bb8d38c..68bafe0a3d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [39] x:\dir\subdir\Test\TestComponent.cshtml) - InputText
                     ComponentAttribute - (24:0,24 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
index 6df29f3a49..7ecdcae141 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToComponent_WithStringAttribute_DoesNotUseStringSyntax/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (57:3,1 [37] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     Person person = new Person();
 |
-Generated Location: (1160:31,1 [37] )
+Generated Location: (1168:31,1 [37] )
 |
     Person person = new Person();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
index 613222c7f6..04a8a17176 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
index 3a18e39b03..8611693c34 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (29:1,0 [114] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (47:1,18 [12] x:\dir\subdir\Test\TestComponent.cshtml) - value=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
index 5121cb2545..6cf5ab743f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithCulture/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (152:2,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1668:47,7 [55] )
+Generated Location: (1676:47,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
index 31bcd414be..7c56e32bfd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
index ae698d2ed9..d1cc9dead3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [104] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
index 36a3a6787f..1a322e71bb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WithFormat_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (113:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1329:33,7 [77] )
+Generated Location: (1337:33,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
index 9b7a94d904..d084b59085 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
index 0e78bca4d0..506a9096b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [77] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
index d55e8ff852..044e942756 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementFallback_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (86:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1295:33,7 [50] )
+Generated Location: (1303:33,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
index 18a0238b4e..1c92205d34 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
index 899deaf92c..6fdc9764e6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (29:1,0 [118] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (47:1,18 [12] x:\dir\subdir\Test\TestComponent.cshtml) - myvalue=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
index c5b19b594e..7b4350e731 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithCulture/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (156:2,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1680:47,7 [55] )
+Generated Location: (1688:47,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
index 185622af05..c57aab1843 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
index 739850cfda..aeddf44934 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [67] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (18:0,18 [12] x:\dir\subdir\Test\TestComponent.cshtml) - myvalue=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
index ecc5662337..67d43fbead 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_OverridesEvent/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (76:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1231:32,7 [55] )
+Generated Location: (1239:32,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
index e362885db8..41e11178d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
index 7195476b1c..dc6e87d5b9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [34] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (18:0,18 [12] x:\dir\subdir\Test\TestComponent.cshtml) - myvalue=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
index 7d00ca8c1e..893229c07f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElementWithSuffix_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (43:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1226:32,7 [55] )
+Generated Location: (1234:32,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
index 619b0b8e13..36ed42e264 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
index 729e293437..0a67936ae1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [33] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (18:0,18 [11] x:\dir\subdir\Test\TestComponent.cshtml) - myvalue=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
index 6bebfc4fe7..487022a470 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WithStringAttribute_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (42:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1225:32,7 [55] )
+Generated Location: (1233:32,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
index d6a2abadc8..4d443cb1b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
index b7087b24f1..251032f7ec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlAttribute - (12:0,12 [12] x:\dir\subdir\Test\TestComponent.cshtml) - myvalue=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
index 56389a7f3a..dcbe8e118f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToElement_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (37:1,7 [55] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public string ParentValue { get; set; } = "hi";
 |
-Generated Location: (1220:32,7 [55] )
+Generated Location: (1228:32,7 [55] )
 |
     public string ParentValue { get; set; } = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
index 40d4fd3f92..d195381c7b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
index ed2e9412fa..d20205e899 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (29:1,0 [83] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
index cf9ddc8421..d2ffac1876 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (121:2,7 [44] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; }
 |
-Generated Location: (1452:40,7 [44] )
+Generated Location: (1460:40,7 [44] )
 |
     public int ParentValue { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
index 21b6da91dd..dba56cb64c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using System.Globalization;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
index f8b1ccf42c..27e347cf49 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [28] x:\dir\subdir\Test\TestComponent.cshtml) - System.Globalization
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (29:1,0 [132] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
index 7185c67db9..b8c7cde3cb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BindToInputElementWithDefaultCulture_Override/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (170:2,7 [44] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; }
 |
-Generated Location: (1764:48,7 [44] )
+Generated Location: (1772:48,7 [44] )
 |
     public int ParentValue { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
index 4bf4bb55ed..4d112ecd48 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
index 5cdabfec09..134bb19f97 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderFragment<string> header = (context) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
index 4d58618c50..39e731d943 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndAttributeChildContent/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<string> header = (context) => |
-Generated Location: (578:17,2 [46] )
+Generated Location: (586:17,2 [46] )
 | RenderFragment<string> header = (context) => |
 
 Source Location: (87:0,87 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1240:37,87 [2] )
+Generated Location: (1248:37,87 [2] )
 |; |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
index bbcf6f148a..8000165752 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
index f9e237eb0b..0a67fa82e6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderFragment<string> header = (context) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
index 4d58618c50..39e731d943 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BodyAndExplicitChildContent/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (2:0,2 [46] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<string> header = (context) => |
-Generated Location: (578:17,2 [46] )
+Generated Location: (586:17,2 [46] )
 | RenderFragment<string> header = (context) => |
 
 Source Location: (87:0,87 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1240:37,87 [2] )
+Generated Location: (1248:37,87 [2] )
 |; |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
index ea0bccd577..e3ea91923e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
index 54ca46159a..f03a53b0ff 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [16] x:\dir\subdir\Test\TestComponent.cshtml) -  type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
index 6739e0a671..f82da25f1a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputCheckbox_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (51:1,7 [41] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public bool Enabled { get; set; }
 |
-Generated Location: (1004:31,7 [41] )
+Generated Location: (1012:31,7 [41] )
 |
     public bool Enabled { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
index 18a5f2ac4e..fb8be2a7a1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
index 57708b0f47..0f2fb7b29c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [73] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (58:1,14 [12] x:\dir\subdir\Test\TestComponent.cshtml) - value=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
index 4365e3b700..f0ab4a9389 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_CanOverrideEvent/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (126:2,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1418:39,7 [77] )
+Generated Location: (1426:39,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
index a0830475fe..365cd0fd2a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
index a3c058d33d..b7e07ce4fb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [64] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [12] x:\dir\subdir\Test\TestComponent.cshtml) -  type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
index 7bd777765f..b6ebac2a58 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormatFromProperty_WritesAttributes/TestComponent.mappings.txt
@@ -4,7 +4,7 @@ Source Location: (73:1,7 [135] x:\dir\subdir\Test\TestComponent.cshtml)
 
     public string Format { get; set; } = "MM/dd/yyyy";
 |
-Generated Location: (1255:40,7 [135] )
+Generated Location: (1263:40,7 [135] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
index 199b63b554..180ec8b4a6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
index 49c7895135..253d1a43cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [67] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [12] x:\dir\subdir\Test\TestComponent.cshtml) -  type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
index 92e6044f5a..6fa42d943b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WithFormat_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (76:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1070:32,7 [77] )
+Generated Location: (1078:32,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
index 074bbe215b..7982c658be 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
index d57debb71c..49af9aa64e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [12] x:\dir\subdir\Test\TestComponent.cshtml) -  type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
index 0225956d1b..ff6af30e2f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputText_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (51:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (1000:31,7 [50] )
+Generated Location: (1008:31,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
index b9c32b05ce..e1b3e14167 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
index b71f1d9158..4a8ebe5425 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [69] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
index f0745afcf9..2c8d626f1e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultCultureAndDefaultFormat_Override/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (78:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1473:33,7 [77] )
+Generated Location: (1481:33,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
index 59f408200b..73badd4052 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
index c8f1da04df..12e8358835 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [44] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
index 93c761ce73..d8e2dac7f1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (53:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1327:33,7 [77] )
+Generated Location: (1335:33,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
index 72cdde4320..095e21ebe9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
index c7e00f2e95..2fc9c593a0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [69] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
index b025fa5efd..fb9f3e27ee 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithDefaultFormat_Override/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (78:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1337:33,7 [77] )
+Generated Location: (1345:33,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
index df95b116e7..e3f1f50afc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
index e0f607d294..26ef780f72 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [63] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (64:1,20 [12] x:\dir\subdir\Test\TestComponent.cshtml) - value=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
index dbcde9630c..22f9fe8567 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (116:2,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1425:39,7 [77] )
+Generated Location: (1433:39,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
index d0e1c44a28..962b4bfac5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
index a0cfa23ccd..646618d8a0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [91] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (20:0,20 [12] x:\dir\subdir\Test\TestComponent.cshtml) - value=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
index d4ce7a14da..b28c475580 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithSuffix_CanOverrideEvent/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (100:1,7 [77] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
-Generated Location: (1260:32,7 [77] )
+Generated Location: (1268:32,7 [77] )
 |
     public DateTime CurrentDate { get; set; } = new DateTime(2018, 1, 1);
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
index efd411045d..730860ac50 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
index b411813ed9..baa38277f7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [30] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [21] x:\dir\subdir\Test\TestComponent.cshtml) -  @BIND=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
index 1e47ca487c..55387b25ee 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_IsCaseSensitive/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (39:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (932:30,7 [50] )
+Generated Location: (940:30,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
index cf6fd8e483..98f3f2dab1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
index ba4dc458d2..320c21a818 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [30] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (6:0,6 [21] x:\dir\subdir\Test\TestComponent.cshtml) -  @bind=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
index 1e47ca487c..55387b25ee 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/BuiltIn_BindToInputWithoutType_WritesAttributes/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (39:1,7 [50] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public int ParentValue { get; set; } = 42;
 |
-Generated Location: (932:30,7 [50] )
+Generated Location: (940:30,7 [50] )
 |
     public int ParentValue { get; set; } = 42;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
index fb263e71f4..4511fb4203 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
index 98b5c39ad0..7f0d118565 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
index 2599613705..5b5d3244b4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
index 4a78015578..bc08833b99 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [44] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
index 4b355ceb8d..a9c56a2527 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (53:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1161:31,7 [21] )
+Generated Location: (1169:31,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
index b9ab2dd10a..d6cc7ddc10 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
index 195a0fa760..0cea8934fa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [44] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
index e2a20c072e..4ecaa60ff3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (53:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1157:31,7 [21] )
+Generated Location: (1165:31,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
index 6ea930455a..2e01d853e5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
index 93ba4b1e33..520adbe55f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [43] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (36:0,36 [5] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
index 07a70b8d49..d80bdfe097 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBindWeaklyTyped_TypeInference/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (52:1,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1210:36,7 [21] )
+Generated Location: (1218:36,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
index ac6d954783..740004ff74 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
index 54e6d6c0cd..39e2326b8f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [31] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (24:0,24 [5] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
index 7f44977f7a..209f291188 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericBind_TypeInference/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (73:2,7 [21] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string Value;
 |
-Generated Location: (1266:38,7 [21] )
+Generated Location: (1274:38,7 [21] )
 |
     string Value;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
index 0bb36c7382..dbec07d0cb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
index fab3ec66bf..6960ff368f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [90] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
index 7f604a1f31..22d9a102cb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
index 72e2c2439d..fa1d8c9193 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericChildContent_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [77] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
index 63bfb017d4..dae026e762 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
index 144a66535a..f63cfe330c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [56] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [6] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
index 95bc507285..f29ad718c2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
index 5197da2fe7..ad0b6b8c9a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_GenericWeaklyTypedAttribute_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [43] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [7] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
index aa8664b283..c090103318 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
index da9aeec8fc..5530117c44 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [29] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [7] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
index d647245581..e4f239c2b4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
index e249ff3423..559787dc57 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Generic_TypeInference_Multiple/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [29] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [7] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
index aa66c33fae..03e45c5c04 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Rendering;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
index e1ce33423f..0e434b2fa1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [50] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Rendering
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (55:2,2 [34] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (55:2,2 [34] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderChildComponent(__builder); 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
index dde6339cd1..1ec6b9fca5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InFunctionsDirective/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (55:2,2 [34] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderChildComponent(__builder); |
-Generated Location: (748:24,2 [34] )
+Generated Location: (756:24,2 [34] )
 | RenderChildComponent(__builder); |
 
 Source Location: (101:4,7 [69] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (101:4,7 [69] x:\dir\subdir\Test\TestComponent.cshtml)
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
 |
-Generated Location: (960:33,7 [69] )
+Generated Location: (968:33,7 [69] )
 |
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
@@ -17,7 +17,7 @@ Generated Location: (960:33,7 [69] )
 Source Location: (195:8,0 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |    }
 |
-Generated Location: (1335:46,0 [7] )
+Generated Location: (1343:46,0 [7] )
 |    }
 |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
index 6d56a97182..481ebef830 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.RenderTree;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
index 245d496a55..d5e7301336 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [51] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.RenderTree
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (54:1,2 [42] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (54:1,2 [42] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    void RenderChildComponent()\n    {\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
index c0fb7475bb..69488d8b9b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_InLocalFunction/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (54:1,2 [42] x:\dir\subdir\Test\TestComponent.cshtml)
     void RenderChildComponent()
     {
 |
-Generated Location: (749:24,2 [42] )
+Generated Location: (757:24,2 [42] )
 |
     void RenderChildComponent()
     {
@@ -12,12 +12,12 @@ Generated Location: (749:24,2 [42] )
 Source Location: (121:5,0 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |    }
 |
-Generated Location: (1113:37,0 [7] )
+Generated Location: (1121:37,0 [7] )
 |    }
 |
 
 Source Location: (135:8,2 [25] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderChildComponent(); |
-Generated Location: (1294:45,2 [25] )
+Generated Location: (1302:45,2 [25] )
 | RenderChildComponent(); |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
index 43bdd76f0b..b0d7535388 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
index 86933a0298..cf7e855efe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [228] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (57:1,2 [58] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
index e500bc5ec2..09f1b42acd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
index a3b338c0a5..8ba90435bd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_MultipleGenerics_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [229] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (58:1,2 [58] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
index b266ad2524..24a8d5ea42 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
index 62a5b6d11d..cbbfb6747c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_NonGenericParameterizedChildContent_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [140] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (32:1,2 [53] x:\dir\subdir\Test\TestComponent.cshtml) - GenericFragment - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
index 87a8aa17ab..b96ed574f6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
index 66f6f1ad64..ad50575236 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_Simple/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
index 9607da8f82..33e0d55d49 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
index c83ccedc4c..7eda56960d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [91] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
index 6780492298..469aadd4bc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
index df9a630b1b..cb53acabed 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithElementOnlyChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [47] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
index 3fc75879c6..51384104c2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
index c2753690f5..c58b90dded 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [61] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (13:0,13 [34] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
index 262067aae3..8c825de9de 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
index 53553b531f..9aff8ff428 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
index 76cc1ff2ed..f3cff83bbe 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitEventHandler/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (46:2,7 [98] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (990:30,7 [98] )
+Generated Location: (998:30,7 [98] )
 |
     private int counter;
     private void Increment(EventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
index 0d90dfec5d..b0cf616b93 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
index d39fff22ee..c52c45380f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitGenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [64] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (13:0,13 [37] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
index 18120398fc..65f1fb330a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
index 5a9a8969bc..72adc534bd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithExplicitStringParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [49] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (29:0,29 [16] x:\dir\subdir\Test\TestComponent.cshtml) - StringProperty - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
index be87aac4d1..088e82ba83 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
index b862d55beb..cae3fd1646 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [107] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
index 38c700ecbd..7495074ab8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
index b9754436cb..75d86a2b66 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterName/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [164] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (30:1,2 [118] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - item
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
index 38c700ecbd..7495074ab8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
index a889a9e5e5..88babfaa53 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithGenericChildContent_SetsParameterNameOnComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [164] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (45:1,2 [103] x:\dir\subdir\Test\TestComponent.cshtml) - ChildContent - item
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
index 5a2d41b691..59f4e117d7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
index 0a2b8aae72..24d8b093b4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [49] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [24] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
index 1b3db951f6..d4cf015fc7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithLambdaEventHandler/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (60:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1003:30,7 [87] )
+Generated Location: (1011:30,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
index f37bbf3287..0af4836048 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
index 81d9728d7a..e3d6621434 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithNonPropertyAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [72] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - some-attribute - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
index 0426607b43..7d13b0d3c7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.codegen.cs
@@ -10,7 +10,7 @@ namespace Test
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/MyPage")]
     [Microsoft.AspNetCore.Components.RouteAttribute("/AnotherRoute/{id}")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
index 2eb66a0f0b..11debcfefc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithPageDirective/TestComponent.ir.txt
@@ -7,6 +7,6 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /MyPage
         RouteAttributeExtensionNode -  - /AnotherRoute/{id}
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (45:2,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
index 3a6ab74a42..45d920ba24 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
index 40d6b5e3c5..8000b2daf6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithParameters/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [132] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (32:1,17 [3] x:\dir\subdir\Test\TestComponent.cshtml) - IntProperty - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
index 4c71667162..01d4d22cdd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
index 87601b15c2..88619c6e56 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (44:1,0 [37] x:\dir\subdir\Test\TestComponent.cshtml) - DynamicElement
                     ComponentAttribute - (70:1,26 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
index 34ad66eeca..29b7ca26e9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildComponent_WithWeaklyTypeEventHandler/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (92:3,7 [60] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Action<MouseEventArgs> OnClick { get; set; }
 |
-Generated Location: (1241:37,7 [60] )
+Generated Location: (1249:37,7 [60] )
 |
     private Action<MouseEventArgs> OnClick { get; set; }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
index 50d7066fe5..fd2c964e59 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using AnotherTest;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
index 16d079b116..065b10211a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ChildContent_FromAnotherNamespace/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [19] x:\dir\subdir\Test\TestComponent.cshtml) - AnotherTest
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (22:2,0 [63] x:\dir\subdir\Test\TestComponent.cshtml) - HeaderComponent
                     ComponentChildContent - (45:3,4 [20] x:\dir\subdir\Test\TestComponent.cshtml) - Header - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
index 29effcf6e5..e65f403066 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.codegen.cs
@@ -23,7 +23,7 @@ using System.Reflection;
 #line hidden
 #nullable disable
     [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
-    public class _Imports : System.Object
+    public partial class _Imports : System.Object
     {
         #pragma warning disable 1998
         protected void Execute()
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
index e2abbca8dd..2d5262445c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentImports/_Imports.ir.txt
@@ -9,7 +9,7 @@ Document -
         UsingDirective - (21:1,1 [25] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - 
             IntermediateToken -  - CSharp - [Microsoft.AspNetCore.Components.LayoutAttribute(typeof(MainLayout))]
-        ClassDeclaration -  - public - _Imports - System.Object - 
+        ClassDeclaration -  - public partial - _Imports - System.Object - 
             MethodDeclaration -  - protected - void - Execute
                 CSharpExpression - (69:4,1 [3] x:\dir\subdir\Test\_Imports.razor)
                     IntermediateToken - (69:4,1 [3] x:\dir\subdir\Test\_Imports.razor) - CSharp - Foo
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
index cc03ae9e8f..92eeab5973 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
index a740d77bf1..bb7d2bbd84 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentParameter_TypeMismatch_ReportsDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [43] x:\dir\subdir\Test\TestComponent.cshtml) - CoolnessMeter
                     ComponentAttribute - (25:0,25 [14] x:\dir\subdir\Test\TestComponent.cshtml) - Coolness - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
index 5a4a7f4e97..e278e10afa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.codegen.cs
@@ -14,7 +14,7 @@ using Microsoft.AspNetCore.Components;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent<TItem1, TItem2> : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent<TItem1, TItem2> : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
index d596262eab..e02f45569c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (1:0,1 [40] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase -  - TItem1, TItem2
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase -  - TItem1, TItem2
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Item1</h1>\n
                 CSharpCode - (98:5,1 [34] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
index d266ed96bb..830e2d6d1b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ComponentWithTypeParameters/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (98:5,1 [34] x:\dir\subdir\Test\TestComponent.cshtml)
 |foreach (var item2 in Items2)
 {
 |
-Generated Location: (775:26,1 [34] )
+Generated Location: (783:26,1 [34] )
 |foreach (var item2 in Items2)
 {
 |
@@ -10,7 +10,7 @@ Generated Location: (775:26,1 [34] )
 Source Location: (178:10,0 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |}
 |
-Generated Location: (1424:51,0 [3] )
+Generated Location: (1432:51,0 [3] )
 |}
 |
 
@@ -20,7 +20,7 @@ Source Location: (188:11,7 [185] x:\dir\subdir\Test\TestComponent.cshtml)
     [Parameter] public List<TItem2> Items2 { get; set; }
     [Parameter] public RenderFragment<TItem2> ChildContent { get; set; }
 |
-Generated Location: (1604:60,7 [185] )
+Generated Location: (1612:60,7 [185] )
 |
     [Parameter] public TItem1 Item1 { get; set; }
     [Parameter] public List<TItem2> Items2 { get; set; }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
index 1a6bfd994b..e05c695de5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using Foo = Test3;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
index 0588c17fee..b0b78a2635 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_IgnoresStaticAndAliasUsings/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [34] x:\dir\subdir\Test\TestComponent.cshtml) - static Test2.SomeComponent
         UsingDirective - (36:1,1 [19] x:\dir\subdir\Test\TestComponent.cshtml) - Foo = Test3
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (55:2,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                 HtmlContent - (70:2,15 [2] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
index 453434e63d..cb28337cb6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
index bf70025a0b..4f1736bf0c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MatchingIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                 MarkupBlock -  - \n<mycomponent></mycomponent>\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
index 01dc21cdee..d577cf2a9e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
index a58911a312..be1a9c342d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_MultipleComponentsDifferByCase/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [31] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (26:0,26 [1] x:\dir\subdir\Test\TestComponent.cshtml) - IntProperty - AttributeStructure.SingleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
index 03822cedcd..f14834a5db 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
index d7e2828ab0..27d9922b47 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_InImports/TestComponent.ir.txt
@@ -7,6 +7,6 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [19] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [25] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Counter
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
index e9a5ae3f06..06c73ef0b9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.codegen.cs
@@ -22,7 +22,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class Counter : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class Counter : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
index 8a6c4dfbd2..e524cb258d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_NamespaceDirective_OverrideImports/Counter.ir.txt
@@ -7,6 +7,6 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [19] x:\dir\subdir\Test\_Imports.razor) - System.Text
         UsingDirective - (21:1,1 [25] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
-        ClassDeclaration -  - public - Counter - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - Counter - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (21:1,0 [12] Counter.razor) - Counter2
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
index 8c15a1cea5..8deff24077 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
index 580d2962cd..1e3b4c0494 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Counter
                 HtmlContent - (11:0,11 [2] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
index 257c9a4d9c..82206d510e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_TextTagsAreNotRendered/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (14:1,1 [18] x:\dir\subdir\Test\TestComponent.cshtml)
 |if (true)
 {
     |
-Generated Location: (725:20,1 [18] )
+Generated Location: (733:20,1 [18] )
 |if (true)
 {
     |
@@ -11,7 +11,7 @@ Source Location: (66:3,38 [5] x:\dir\subdir\Test\TestComponent.cshtml)
 |
 }
 |
-Generated Location: (966:30,38 [5] )
+Generated Location: (974:30,38 [5] )
 |
 }
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
index 88c97a9e79..ba7c557a07 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
index 41daeb1b8b..10da908cb1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithDocType/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 HtmlContent - (0:0,0 [17] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (0:0,0 [17] x:\dir\subdir\Test\TestComponent.cshtml) - Html - <!DOCTYPE html>\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
index 1202b7c81d..1ca18e16b3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
index 5f6457ac2f..34108d9c57 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithFullyQualifiedTagNames/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                 HtmlContent - (15:0,15 [2] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
index 8632fa0885..94d8540a09 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
index 1c8f441484..10110bdd17 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [43] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - @onclick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
index 9fac1cac91..99c940c080 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImplicitLambdaEventHandler/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (54:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (805:22,7 [87] )
+Generated Location: (813:22,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
index 6bc2168491..00208b896c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.codegen.cs
@@ -29,7 +29,7 @@ using System.Reflection;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
index fa1ae256a2..ceb2775332 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithImportsFile/TestComponent.ir.txt
@@ -9,6 +9,6 @@ Document -
         UsingDirective - (21:1,1 [25] x:\dir\subdir\Test\_Imports.razor) - System.Reflection
         CSharpCode - (57:2,11 [14] x:\dir\subdir\Test\_Imports.razor)
             IntermediateToken - (57:2,11 [14] x:\dir\subdir\Test\_Imports.razor) - CSharp - [Serializable]
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [11] x:\dir\subdir\Test\TestComponent.cshtml) - Counter
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
index 5e5218e2e5..2031e415bf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
index 1d4696f21c..b41180f006 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [75] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - ParamBefore - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
index 9a0a659ea6..90e0c8aa9f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (40:0,40 [12] x:\dir\subdir\Test\TestComponent.cshtml)
 |someDate.Day|
-Generated Location: (834:21,40 [12] )
+Generated Location: (842:21,40 [12] )
 |someDate.Day|
 
 Source Location: (86:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private DateTime someDate = DateTime.Now;
 |
-Generated Location: (1081:32,7 [49] )
+Generated Location: (1089:32,7 [49] )
 |
     private DateTime someDate = DateTime.Now;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
index 8bc7566313..b528bea11e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
index c80ab6a5ea..dfa54bd417 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [96] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
index d55a54212a..0524b9fbdd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithKey_WithChildContent/TestComponent.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (19:0,19 [9] x:\dir\subdir\Test\TestComponent.cshtml)
 |123 + 456|
-Generated Location: (1045:27,19 [9] )
+Generated Location: (1053:27,19 [9] )
 |123 + 456|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
index 6b44f2b991..343f6b54e7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
index 1e37dae58c..3d8effc235 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithNamespaceDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (39:3,0 [51] x:\dir\subdir\Test\TestComponent.cshtml) - HeaderComponent
                     ComponentAttribute - (64:3,25 [4] x:\dir\subdir\Test\TestComponent.cshtml) - Header - AttributeStructure.SingleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
index ba86a76a59..ad5479c69d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
index c724647179..7da0ce2b7c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [73] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - ParamBefore - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
index 0ca7d8ee94..6c720134d4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (40:0,40 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |myInstance|
-Generated Location: (873:21,40 [10] )
+Generated Location: (881:21,40 [10] )
 |myInstance|
 
 Source Location: (84:2,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (84:2,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
 |
-Generated Location: (1162:33,7 [104] )
+Generated Location: (1170:33,7 [104] )
 |
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
index 500298b6c9..201ca9d03a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
index 1bc1814490..7d1c67f32f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [97] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
index 1f290c1c54..7a7028eb28 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithRef_WithChildContent/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (19:0,19 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |myInstance|
-Generated Location: (1084:27,19 [10] )
+Generated Location: (1092:27,19 [10] )
 |myInstance|
 
 Source Location: (108:4,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (108:4,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
 |
-Generated Location: (1373:39,7 [104] )
+Generated Location: (1381:39,7 [104] )
 |
     private Test.MyComponent myInstance;
     public void Foo() { System.GC.KeepAlive(myInstance); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
index bd2bf2016c..746ff1518b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
index 30826c2804..3429b2d1ec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [92] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - AttributeBefore - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
index f34385a2d5..860b30df36 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (103:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1308:32,7 [93] )
+Generated Location: (1316:32,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
index a60d0a704e..301d92f34c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
index a26f802577..b0ca2494c6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [95] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - AttributeBefore - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
index 55b27f4e33..071348e585 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ExplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1310:32,7 [93] )
+Generated Location: (1318:32,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
index 16332db5ac..1fcd536fea 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
index 286bcc16d5..44551cade9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [58] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (20:0,20 [2] x:\dir\subdir\Test\TestComponent.cshtml) - Value - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
index 06f9c88ebe..2c07b4039e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_GenericTypeInference/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (69:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1079:36,7 [93] )
+Generated Location: (1087:36,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
index 104536cb0c..170a5b1255 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
index 328956d3b4..ab5ee99b5e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [93] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - AttributeBefore - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
index 8ce8b2b18b..34e5da0a5e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithSplat_ImplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (104:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1309:32,7 [93] )
+Generated Location: (1317:32,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
index 90128a13fa..ef10095f8e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.codegen.cs
@@ -17,7 +17,7 @@ using Test2;
 #nullable disable
     [Microsoft.AspNetCore.Components.RouteAttribute("/MyPage")]
     [Microsoft.AspNetCore.Components.RouteAttribute("/AnotherRoute/{id}")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
index 8a1b089bae..8001655739 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives/TestComponent.ir.txt
@@ -8,7 +8,7 @@ Document -
         UsingDirective - (46:2,1 [13] x:\dir\subdir\Test\TestComponent.cshtml) - Test2
         RouteAttributeExtensionNode -  - /MyPage
         RouteAttributeExtensionNode -  - /AnotherRoute/{id}
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (59:3,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                 HtmlContent - (74:3,15 [2] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
index 1cfe84eccd..2a000ec541 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.codegen.cs
@@ -22,7 +22,7 @@ using Test3;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
index b802e539fb..d6914eb2c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Component_WithUsingDirectives_AmbiguousImport/TestComponent.ir.txt
@@ -7,7 +7,7 @@ Document -
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [13] x:\dir\subdir\Test\TestComponent.cshtml) - Test2
         UsingDirective - (15:1,1 [13] x:\dir\subdir\Test\TestComponent.cshtml) - Test3
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (28:2,0 [15] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                 HtmlContent - (43:2,15 [2] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
index d50deab626..6969144ef8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
index 854427f5fd..05be10eaa1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  \n  var myValue = "Expression value";\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
index 1c7d63b87a..91356d82da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ExplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (578:17,2 [40] )
+Generated Location: (586:17,2 [40] )
 | 
   var myValue = "Expression value";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
index 71c3425ad5..0e9df4dee9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
index 0ccf3f8fed..292cda17cb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  \n  var myValue = "Expression value";\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
index 1c7d63b87a..91356d82da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DataDashAttribute_ImplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (578:17,2 [40] )
+Generated Location: (586:17,2 [40] )
 | 
   var myValue = "Expression value";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
index b4857ae33a..720b7182b1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
index 5b3a5785b4..c8c04397d2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [45] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [4] x:\dir\subdir\Test\TestComponent.cshtml) - Message - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
index 38b43f29a1..7bac017262 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
index 105f53f39a..25345f1b0c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [59] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [8] x:\dir\subdir\Test\TestComponent.cshtml) - Message - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
index 80f868260e..ae8f96b2a5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessage/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (73:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2013:41,12 [30] )
+Generated Location: (2021:41,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
index fb1c3023f6..3007a71be0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
index f30e0af346..9cec88099f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [70] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (29:0,29 [12] x:\dir\subdir\Test\TestComponent.cshtml) - MessageChanged - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
index 44794b9c49..6bb2ccfb90 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageChanged/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (84:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2171:41,12 [30] )
+Generated Location: (2179:41,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
index 81081bdf5c..8b46f7e97a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
index 4c1d2f3e36..b234a58f15 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [73] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (57:0,57 [12] x:\dir\subdir\Test\TestComponent.cshtml) - MessageExpression - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
index 3dd3bd719e..8ff639eb64 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_BindMessageExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (87:1,12 [30] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string message = "hi";
 |
-Generated Location: (2093:41,12 [30] )
+Generated Location: (2101:41,12 [30] )
 |
     string message = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
index 46ef7ee9ac..0223186764 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
index cf083f5ca4..8c20c432a3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_Multiple/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [66] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [4] x:\dir\subdir\Test\TestComponent.cshtml) - Message - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
index 3511a5d9b9..d598722d48 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
index e434a9fce7..955189823e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateComponentParameters_IsAnError_WeaklyTyped/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [37] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute -  - Foo - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
index 7691ac3161..8698a027f3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
index 1783e5ad1b..e28b89d9a1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [69] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (49:1,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
index ed71312a8a..f76be5b17e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_DifferentCasing_IsAnError_BindValue/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (127:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (1696:45,12 [35] )
+Generated Location: (1704:45,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
index 3a62a163aa..1692b5a96d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
index 1620f5850d..039aab4499 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [140] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (5:0,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
index f98698a73e..0d94284032 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
index 34a92ffb58..2fb3c958c5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [112] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (49:1,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
index a530cf8a2f..867fd2df72 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindOnInput/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (170:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (2028:53,12 [35] )
+Generated Location: (2036:53,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
index 0aba3aeb2a..5c4151e716 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
index 2e1fc7edd2..67311e03d1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [69] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (49:1,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
index ed71312a8a..f76be5b17e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_BindValue/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (127:4,12 [35] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private string text = "hi";
 |
-Generated Location: (1696:45,12 [35] )
+Generated Location: (1704:45,12 [35] )
 |
     private string text = "hi";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
index 871f214c17..f9ca0bdec8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
index e970d831de..931b4be212 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_IsAnError_EventHandler/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [118] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (49:1,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
index ac15f56cc4..1d52b314c0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
index bc80339ed7..8c19f54db3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/DuplicateMarkupAttributes_Multiple_IsAnError/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [145] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (5:0,5 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
index 338fb49b28..b75affc937 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
index f3e523b7a0..07844b458a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ElementWithUppercaseTagName_CanHideWarningWithBang/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <NotAComponent></NotAComponent>\n<DefinitelyNotAComponent></DefinitelyNotAComponent>
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
index 57e5d27840..a587a2314f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
index 9272a58d70..820653d513 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [84] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlContent - (72:0,72 [5] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
index c46f7100b8..32edccc7d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (37:0,37 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |someObject|
-Generated Location: (827:21,37 [10] )
+Generated Location: (835:21,37 [10] )
 |someObject|
 
 Source Location: (95:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object someObject = new object();
 |
-Generated Location: (1117:33,7 [49] )
+Generated Location: (1125:33,7 [49] )
 |
     private object someObject = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
index 49027ac9d0..59e76bdd99 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
index c84161056a..5713386341 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [63] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
index d5a06aa130..2bf586f3fc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AndOtherAttributes/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (49:0,49 [10] x:\dir\subdir\Test\TestComponent.cshtml)
 |someObject|
-Generated Location: (997:29,49 [10] )
+Generated Location: (1005:29,49 [10] )
 |someObject|
 
 Source Location: (74:2,7 [109] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -9,7 +9,7 @@ Source Location: (74:2,7 [109] x:\dir\subdir\Test\TestComponent.cshtml)
 
         [Parameter] public int Min { get; set; }
     |
-Generated Location: (1240:40,7 [109] )
+Generated Location: (1248:40,7 [109] )
 |
         private object someObject = new object();
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 669aa6b472..c2b19618c8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index 554b419774..90fb3ecb8d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <elem attributebefore="before" @KEY="someObject" attributeafter="after">Hello</elem>
             CSharpCode - (95:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 81fe48cac3..28a17769e9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithKey_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (95:2,7 [49] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object someObject = new object();
 |
-Generated Location: (770:20,7 [49] )
+Generated Location: (778:20,7 [49] )
 |
     private object someObject = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
index bccd61fb44..75c9f9dcb9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
index b9ffc7754d..0b5f3c72e4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [80] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlContent - (68:0,68 [5] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
index 33a1ffc706..de1df1b068 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (37:0,37 [6] x:\dir\subdir\Test\TestComponent.cshtml)
 |myElem|
-Generated Location: (864:21,37 [6] )
+Generated Location: (872:21,37 [6] )
 |myElem|
 
 Source Location: (91:2,7 [128] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (91:2,7 [128] x:\dir\subdir\Test\TestComponent.cshtml)
     private Microsoft.AspNetCore.Components.ElementReference myElem;
     public void Foo() { System.GC.KeepAlive(myElem); }
 |
-Generated Location: (1176:34,7 [128] )
+Generated Location: (1184:34,7 [128] )
 |
     private Microsoft.AspNetCore.Components.ElementReference myElem;
     public void Foo() { System.GC.KeepAlive(myElem); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
index f425681378..01ec096e78 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
index 62d17f05fd..c627461520 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [61] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute -  - type=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
index f35554549b..78f9115f7f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AndOtherAttributes/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (49:0,49 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_element|
-Generated Location: (1034:29,49 [8] )
+Generated Location: (1042:29,49 [8] )
 |_element|
 
 Source Location: (72:2,7 [164] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -10,7 +10,7 @@ Source Location: (72:2,7 [164] x:\dir\subdir\Test\TestComponent.cshtml)
         [Parameter] public int Min { get; set; }
         public void Foo() { System.GC.KeepAlive(_element); }
     |
-Generated Location: (1301:41,7 [164] )
+Generated Location: (1309:41,7 [164] )
 |
         private ElementReference _element;
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 2ebd414c51..e5693cb9ed 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index ee469bdbbc..15382360d9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithRef_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <elem attributebefore="before" @rEF="myElem" attributeafter="after">Hello</elem>
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
index f051832363..808c64c366 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
index 3d2bb8827d..279394a318 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [95] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlContent - (83:0,83 [5] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
index 5f97cfc9c3..32dd6a1f4d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1334:33,7 [93] )
+Generated Location: (1342:33,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 52beeca87d..7b966c1ca2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index a92e72da17..aa001c3e44 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <elem attributebefore="before" @ATTributes="someAttributes" attributeafter="after">Hello</elem>
             CSharpCode - (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 9e83a67391..2463912511 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (106:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (781:20,7 [93] )
+Generated Location: (789:20,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
index a023ad48df..34490d41e4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
index 9b36e0b4c1..d7f1c8bbb0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [98] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlContent - (86:0,86 [5] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
index 8ec5df3e2b..9a3a536897 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ExplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (109:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1336:33,7 [93] )
+Generated Location: (1344:33,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
index fad15e7ed8..2b420a0229 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
index e028cc8181..326e1bdaa1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [96] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlContent - (84:0,84 [5] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
index 82d3039280..af6aa3bfeb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Element_WithSplat_ImplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (107:2,7 [93] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
-Generated Location: (1335:33,7 [93] )
+Generated Location: (1343:33,7 [93] )
 |
     private Dictionary<string, object> someAttributes = new Dictionary<string, object>();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
index d447b3ee04..fe520fc600 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
index f0d049c4f8..a0a30b8ab0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (44:1,0 [89] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (66:1,22 [64] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
index 822be515cc..cf419cfbeb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Explicitly/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (144:3,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1464:37,7 [87] )
+Generated Location: (1472:37,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
index 42651329f0..7305b70217 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
index bf9f7bbe21..bcc2d307aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
index f164a922a0..1c36f36b4d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_Action/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1247:30,7 [87] )
+Generated Location: (1255:30,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
index 2c62367bf9..b0dde1ec8f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
index 5ad9c376ce..399f6aaccf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (44:1,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (66:1,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
index bdbc4237e2..e73ad85539 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_ActionOfT/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (90:3,7 [103] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1411:37,7 [103] )
+Generated Location: (1419:37,7 [103] )
 |
     private int counter;
     private void Increment(MouseEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
index 2843ecb025..78fb42ebb6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
index b0afa992ef..2267e969d7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (44:1,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (66:1,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
index ee6caa7849..ce6a03a2f6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTTask/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (90:3,7 [139] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1411:37,7 [139] )
+Generated Location: (1419:37,7 [139] )
 |
     private int counter;
     private Task Increment(MouseEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
index fc735d5239..d9052cfeb2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
index 655b21550e..375dc6ca85 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
index 4a9fe1a151..3f2be92e4f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_FuncOfTask/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1247:30,7 [123] )
+Generated Location: (1255:30,7 [123] )
 |
     private int counter;
     private Task Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
index 71d147c025..078a67e995 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
index d8aa7e8884..ce367272ff 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (44:1,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (66:1,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
index 4fbbc124ec..4d9f2df89d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallbackOfT_Implicitly_TypeMismatch/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (90:3,7 [104] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1411:37,7 [104] )
+Generated Location: (1419:37,7 [104] )
 |
     private int counter;
     private void Increment(ChangeEventArgs e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
index 50f18a1b27..40914c447e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
index 59a76bd0f7..9d562d79a1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [73] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [48] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
index c565ef85e5..7b0d879493 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Explicitly/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (84:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1180:30,7 [87] )
+Generated Location: (1188:30,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
index 19339d0b13..8f65beaa0b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
index bf9f7bbe21..bcc2d307aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
index 0f30f98457..4e00aa71c2 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_Action/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (46:2,7 [87] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1143:30,7 [87] )
+Generated Location: (1151:30,7 [87] )
 |
     private int counter;
     private void Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
index 4ef3fc99ee..a58a3e01e5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
index d54c458849..c933d37792 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
index 5e48d447b8..1e809cd67f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_ActionOfObject/TestComponent.mappings.txt
@@ -5,7 +5,7 @@ Source Location: (46:2,7 [95] x:\dir\subdir\Test\TestComponent.cshtml)
         counter++;
     }
 |
-Generated Location: (1143:30,7 [95] )
+Generated Location: (1151:30,7 [95] )
 |
     private int counter;
     private void Increment(object e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
index 1d3203fee7..40e4530fd0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
index 655b21550e..375dc6ca85 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
index 75957fa3cb..9caaa5c2b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfTask/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (46:2,7 [123] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1143:30,7 [123] )
+Generated Location: (1151:30,7 [123] )
 |
     private int counter;
     private Task Increment() {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
index 3bc7d08c7c..cd54b177d7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
index 1302ce6e14..6850ddde90 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (22:0,22 [10] x:\dir\subdir\Test\TestComponent.cshtml) - OnClick - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
index 1d827bbc3d..9126a97304 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventCallback_CanPassEventCallback_Implicitly_FuncOfobjectTask/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (46:2,7 [131] x:\dir\subdir\Test\TestComponent.cshtml)
         return Task.CompletedTask;
     }
 |
-Generated Location: (1143:30,7 [131] )
+Generated Location: (1151:30,7 [131] )
 |
     private int counter;
     private Task Increment(object e) {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
index 4611e1077d..469d7009f3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
index 399a50f0ad..8d61935237 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandlerTagHelper_EscapeQuotes/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <input onfocus="alert("Test");">
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
index 8a2bc393a8..9cef9c2f9d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
index e746f62e6e..920909a97a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <input @onCLICK="OnClick">
             CSharpCode - (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
index 5f82913831..cd25566915 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_AttributeNameIsCaseSensitive/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (872:27,7 [47] )
+Generated Location: (880:27,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
index 467d90e842..a52a09b1a0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
index 11cc765bcb..5ffa1c26eb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
index 14cead9ce8..7ce0cd386b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_ArbitraryEventName_WithEventArgsMethodGroup/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (81:2,7 [42] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(EventArgs e) {
     }
 |
-Generated Location: (1216:37,7 [42] )
+Generated Location: (1224:37,7 [42] )
 |
     void OnClick(EventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
index 7b486b43c4..ea0b4bacd5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
index 59ab34f294..cf1177e1dd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
index d9c7271f33..2beea7ab95 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithDelegate/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (1216:37,7 [47] )
+Generated Location: (1224:37,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
index becce32d67..1a3f72a26f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
index 5a3e44bafc..ad0d2cd629 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsLambdaDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [29] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [8] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
index 7b486b43c4..ea0b4bacd5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
index 59ab34f294..cf1177e1dd 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
index d9c7271f33..2beea7ab95 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithEventArgsMethodGroup/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (81:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick(MouseEventArgs e) {
     }
 |
-Generated Location: (1216:37,7 [47] )
+Generated Location: (1224:37,7 [47] )
 |
     void OnClick(MouseEventArgs e) {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
index 1c5c56c3ae..5d561a71d7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
index 2a7da659fc..60704a5e36 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithLambdaDelegate/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <input @onclick="x => { }">
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
index 696b79bd9c..c364c24b92 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
index d59c47cb75..0496b08d28 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [28] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [7] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
index 4c8c812648..b435f29199 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgMethodGroup/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (81:2,7 [31] x:\dir\subdir\Test\TestComponent.cshtml)
     void OnClick() {
     }
 |
-Generated Location: (1216:37,7 [31] )
+Generated Location: (1224:37,7 [31] )
 |
     void OnClick() {
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
index fc44e9f1af..0d33c0a7aa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
index cfddff9ca0..80d0091f0f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithNoArgsLambdaDelegate/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [30] x:\dir\subdir\Test\TestComponent.cshtml) - input
                     HtmlAttribute - (61:1,17 [9] x:\dir\subdir\Test\TestComponent.cshtml) - onclick=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
index a33be57a79..21a407ad54 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
index 70a0037442..e85051e51d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/EventHandler_OnElement_WithString/TestComponent.ir.txt
@@ -6,6 +6,6 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <input onclick="foo">
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
index e9a3b5ca54..e91d8df717 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
index 2214655b97..e8eb031160 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallbackWithGenericTypeParameter_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (13:1,0 [48] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
index 7793531abe..7175a038f6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
index 033d43f1e1..7108e765d3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_GenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (13:1,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
index 7395ef5af5..30b6b017c3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
index 033d43f1e1..7108e765d3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NestedGenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (13:1,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
index 7869cdebe7..bce4f61c97 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
index 033d43f1e1..7108e765d3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericEventCallback_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [12] x:\dir\subdir\Test\TestComponent.cshtml) - Test
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (13:1,0 [42] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (32:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
index 9931408550..8f65d3cb5b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Test.Shared;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
index f92c602e93..464ec36079 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [19] x:\dir\subdir\Test\TestComponent.cshtml) - Test.Shared
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (20:1,0 [37] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (39:1,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
index 5f284d1210..3347fa49ea 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_NonGenericParameter_TypeInference/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (68:3,7 [38] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     MyClass Hello = new MyClass();
 |
-Generated Location: (1197:43,7 [38] )
+Generated Location: (1205:43,7 [38] )
 |
     MyClass Hello = new MyClass();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
index 2bae2266c8..c3d4972aad 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
index 5dbefda847..173aa8f3d6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [45] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [3] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
index 35cce98a12..98497b2473 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_CreatesDiagnostic/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (38:0,38 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |_my|
-Generated Location: (1044:28,38 [3] )
+Generated Location: (1052:28,38 [3] )
 |_my|
 
 Source Location: (56:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (56:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
 |
-Generated Location: (1331:40,7 [90] )
+Generated Location: (1339:40,7 [90] )
 |
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
index bbcfa74722..ff15df9e2a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
index cde256a50b..8fbb88c926 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [35] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
index 3c103a0ec3..92049ea4d1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithComponentRef_TypeInference_CreatesDiagnostic/TestComponent.mappings.txt
@@ -1,6 +1,6 @@
 Source Location: (28:0,28 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |_my|
-Generated Location: (872:26,28 [3] )
+Generated Location: (880:26,28 [3] )
 |_my|
 
 Source Location: (46:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
@@ -8,7 +8,7 @@ Source Location: (46:2,7 [90] x:\dir\subdir\Test\TestComponent.cshtml)
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
 |
-Generated Location: (1095:37,7 [90] )
+Generated Location: (1103:37,7 [90] )
 |
     private MyComponent<int> _my;
     public void Foo() { System.GC.KeepAlive(_my); }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
index 383c6e3de5..d8a7967fa3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
index 0b361fd41c..b7cd7e9fcb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithFullyQualifiedTagName/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [87] x:\dir\subdir\Test\TestComponent.cshtml) - Test.MyComponent
                     ComponentChildContent -  - ChildContent - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
index e2052de080..8f217b96c9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
index f910f85b44..3d92af0ed0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [50] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentTypeArgument - (19:0,19 [3] x:\dir\subdir\Test\TestComponent.cshtml) - TItem
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
index c2c2966874..6b29370fdc 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (38:0,38 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_someKey|
-Generated Location: (1005:28,38 [8] )
+Generated Location: (1013:28,38 [8] )
 |_someKey|
 
 Source Location: (61:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object _someKey = new object();
 |
-Generated Location: (1248:39,7 [47] )
+Generated Location: (1256:39,7 [47] )
 |
     private object _someKey = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
index fcf9a78f16..d134245da6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
index bfaf4a6def..c9391bc849 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [40] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [1] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
index df8e691bed..5ec0506266 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/GenericComponent_WithKey_TypeInference/TestComponent.mappings.txt
@@ -1,13 +1,13 @@
 Source Location: (28:0,28 [8] x:\dir\subdir\Test\TestComponent.cshtml)
 |_someKey|
-Generated Location: (858:26,28 [8] )
+Generated Location: (866:26,28 [8] )
 |_someKey|
 
 Source Location: (51:2,7 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     private object _someKey = new object();
 |
-Generated Location: (1060:36,7 [47] )
+Generated Location: (1068:36,7 [47] )
 |
     private object _someKey = new object();
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
index 1e617b6b4e..121ad727ab 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
index 0b3d0fe26d..763a2bc3bb 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpExpression - (2:0,2 [10] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [10] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - "My value"
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
index 6d3f553d68..324adf9e46 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
index bfd9d69a0d..c6dc3beb1b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [22] x:\dir\subdir\Test\TestComponent.cshtml) - SomeOtherComponent
                 HtmlContent - (22:0,22 [4] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
index 641d0cb298..3c19ffe010 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.codegen.cs
@@ -14,7 +14,7 @@ using System;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
index 0319c00bbc..652c51b282 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/LeadingWhiteSpace_WithDirective/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [14] x:\dir\subdir\Test\TestComponent.cshtml) - System
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello</h1>
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
index 2992055209..7f03cf522e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
index e80069bb13..89e65ae57e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  \n  var myValue = "Expression value";\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
index 1c7d63b87a..91356d82da 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MarkupComment_IsNotIncluded/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (2:0,2 [40] x:\dir\subdir\Test\TestComponent.cshtml)
 | 
   var myValue = "Expression value";
 |
-Generated Location: (578:17,2 [40] )
+Generated Location: (586:17,2 [40] )
 | 
   var myValue = "Expression value";
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
index a8340499a0..650a35e5af 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
index 80f8dce702..d16ec66028 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/MultipleExplictChildContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [87] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentChildContent - (19:1,4 [20] x:\dir\subdir\Test\TestComponent.cshtml) - Header - context
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
index 9d353958e1..056b2540d9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
index 72984229f1..0a9913a083 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [53] x:\dir\subdir\Test\TestComponent.cshtml) - MyComponent
                     ComponentAttribute - (19:0,19 [5] x:\dir\subdir\Test\TestComponent.cshtml) - Item - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
index f2ceb6361a..7a4c8ccae0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/NonGenericComponent_WithGenericEventHandler/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (64:2,7 [39] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     public void MyEventHandler() {}
 |
-Generated Location: (858:23,7 [39] )
+Generated Location: (866:23,7 [39] )
 |
     public void MyEventHandler() {}
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
index 60f201c50b..88c0572aca 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
index 4b747bb9b0..70c86a1eef 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [54] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [54] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderFragment<Test.Context> template = (context) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
index 5896bf1144..189474be14 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_AsComponentParameter_MixedContent/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (2:0,2 [54] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<Test.Context> template = (context) => |
-Generated Location: (578:17,2 [54] )
+Generated Location: (586:17,2 [54] )
 | RenderFragment<Test.Context> template = (context) => |
 
 Source Location: (107:0,107 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1647:48,107 [2] )
+Generated Location: (1655:48,107 [2] )
 |; |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
index 4245d11504..2bc235cb2c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
index 5634baf6df..78f478f163 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    RenderFragment<Person> p = (person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
index da87e2cd45..836caab115 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_ContainsComponent/TestComponent.mappings.txt
@@ -1,14 +1,14 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (578:17,2 [45] )
+Generated Location: (586:17,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (93:1,89 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1450:40,89 [3] )
+Generated Location: (1458:40,89 [3] )
 |;
 |
 
@@ -19,7 +19,7 @@ Source Location: (106:3,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (1629:49,7 [76] )
+Generated Location: (1637:49,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
index 0fc9c79187..1a54116eb4 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
index 746f757a3d..61f3ca9b38 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    RenderFragment<Person> p = (person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
index 601ddb21de..ad61d61350 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_FollowedByComponent/TestComponent.mappings.txt
@@ -1,14 +1,14 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (578:17,2 [45] )
+Generated Location: (586:17,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (93:1,89 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1450:40,89 [3] )
+Generated Location: (1458:40,89 [3] )
 |;
 |
 
@@ -19,7 +19,7 @@ Source Location: (159:7,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (2199:65,7 [76] )
+Generated Location: (2207:65,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
index 3cce17476b..bafe4bdc50 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
index 7e65894e97..cfcce32483 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [47] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [47] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderFragment<Person> template = (person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
index bbd7ec5a32..aeeba7280b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_AsComponentParameter/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (2:0,2 [47] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment<Person> template = (person) => |
-Generated Location: (578:17,2 [47] )
+Generated Location: (586:17,2 [47] )
 | RenderFragment<Person> template = (person) => |
 
 Source Location: (73:0,73 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (1213:37,73 [2] )
+Generated Location: (1221:37,73 [2] )
 |; |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
index 260bf8d149..bd3cd885b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
index 67cf9969c2..700ce91d72 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpExpression - (1:0,1 [49] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (1:0,1 [25] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - RenderPerson((person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
index 4eedb74b90..f75add9cec 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_Generic_InImplicitExpression/TestComponent.mappings.txt
@@ -7,7 +7,7 @@ Source Location: (60:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
 
     object RenderPerson(RenderFragment<Person> p) => null;
 |
-Generated Location: (1377:48,7 [138] )
+Generated Location: (1385:48,7 [138] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
index 7e46a81fc2..7a0e0e8c03 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
index d6be2227fd..d59185849d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    RenderFragment<Person> p = (person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
index a3b0e50906..41e5e233b5 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InCodeBlock/TestComponent.mappings.txt
@@ -1,14 +1,14 @@
 Source Location: (2:0,2 [45] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     RenderFragment<Person> p = (person) => |
-Generated Location: (578:17,2 [45] )
+Generated Location: (586:17,2 [45] )
 |
     RenderFragment<Person> p = (person) => |
 
 Source Location: (71:1,67 [3] x:\dir\subdir\Test\TestComponent.cshtml)
 |;
 |
-Generated Location: (1199:38,67 [3] )
+Generated Location: (1207:38,67 [3] )
 |;
 |
 
@@ -19,7 +19,7 @@ Source Location: (84:3,7 [76] x:\dir\subdir\Test\TestComponent.cshtml)
         public string Name { get; set; }
     }
 |
-Generated Location: (1378:47,7 [76] )
+Generated Location: (1386:47,7 [76] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
index f21c38cce0..d5b8baf16f 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
index a7e7a36d96..90b50ab84b 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpExpression - (2:0,2 [49] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [25] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - RenderPerson((person) => 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
index 8d853cc485..ed8cc20619 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_InExplicitExpression/TestComponent.mappings.txt
@@ -7,7 +7,7 @@ Source Location: (62:1,7 [138] x:\dir\subdir\Test\TestComponent.cshtml)
 
     object RenderPerson(RenderFragment<Person> p) => null;
 |
-Generated Location: (1380:48,7 [138] )
+Generated Location: (1388:48,7 [138] )
 |
     class Person
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
index 514248aa56..84c8907576 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
index 7457e4752d..25f8aafe53 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (2:0,2 [27] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (2:0,2 [27] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp -  RenderFragment template = 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
index 7d46380c18..015a9c01ef 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_AsComponentParameter/TestComponent.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (2:0,2 [27] x:\dir\subdir\Test\TestComponent.cshtml)
 | RenderFragment template = |
-Generated Location: (578:17,2 [27] )
+Generated Location: (586:17,2 [27] )
 | RenderFragment template = |
 
 Source Location: (45:0,45 [2] x:\dir\subdir\Test\TestComponent.cshtml)
 |; |
-Generated Location: (886:27,45 [2] )
+Generated Location: (894:27,45 [2] )
 |; |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
index 2b59e51e85..5f6d44c0e6 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
index de25acd7a8..4b92f44678 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpExpression - (1:0,1 [27] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (1:0,1 [13] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - RenderPerson(
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
index 01f474539b..a196ca0047 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/RazorTemplate_NonGeneric_InImplicitExpression/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (38:1,7 [54] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     object RenderPerson(RenderFragment p) => null;
 |
-Generated Location: (1085:38,7 [54] )
+Generated Location: (1093:38,7 [54] )
 |
     object RenderPerson(RenderFragment p) => null;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
index 7a8947af80..063bc389ea 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
index 629774d50b..cf75d527c3 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [23] x:\dir\subdir\Test\TestComponent.cshtml) - Counter
                     ComponentAttribute - (18:0,18 [1] x:\dir\subdir\Test\TestComponent.cshtml) - v - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
index c9f47a4851..9eda2687ac 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_597/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (32:1,7 [24] x:\dir\subdir\Test\TestComponent.cshtml)
 |
     string y = null;
 |
-Generated Location: (1108:31,7 [24] )
+Generated Location: (1116:31,7 [24] )
 |
     string y = null;
 |
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
index 29a77a9f76..d889b32a86 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
index d376d038a3..eb577d71be 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 Component - (0:0,0 [62] x:\dir\subdir\Test\TestComponent.cshtml) - User
                     ComponentAttribute - (18:0,18 [9] x:\dir\subdir\Test\TestComponent.cshtml) - Name - AttributeStructure.DoubleQuotes
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
index ac3ce2f184..cee873f72e 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_609/TestComponent.mappings.txt
@@ -3,7 +3,7 @@ Source Location: (73:2,7 [88] x:\dir\subdir\Test\TestComponent.cshtml)
     public string UserName { get; set; }
     public bool UserIsActive { get; set; }
 |
-Generated Location: (1588:41,7 [88] )
+Generated Location: (1596:41,7 [88] )
 |
     public string UserName { get; set; }
     public bool UserIsActive { get; set; }
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
index b69675629b..fed072391c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
index 84bd548664..79ffa51288 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_772/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello, world!</h1>\n\nWelcome to your new app.\n\n
                 Component - (67:6,0 [23] x:\dir\subdir\Test\TestComponent.cshtml) - SurveyPrompt
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
index e73f1774c1..39b5e8deb0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
index 2a2f7afa73..32daefbab0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_773/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello, world!</h1>\n\nWelcome to your new app.\n\n
                 Component - (67:6,0 [41] x:\dir\subdir\Test\TestComponent.cshtml) - SurveyPrompt
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
index 4cd1eef10e..bd9df63baa 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Web;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
index a6bf10b6f8..67d623e21a 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [43] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Web
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (44:1,0 [73] x:\dir\subdir\Test\TestComponent.cshtml) - p
                     HtmlAttribute - (61:1,17 [16] x:\dir\subdir\Test\TestComponent.cshtml) - onmouseover=" - "
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
index f8582a7315..2f1479d830 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Regression_784/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (126:2,7 [130] x:\dir\subdir\Test\TestComponent.cshtml)
     {
     }
 |
-Generated Location: (1510:46,7 [130] )
+Generated Location: (1518:46,7 [130] )
 |
     public string ParentBgColor { get; set; } = "#FFFFFF";
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
index 92ca67bae4..11af4cefd1 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
index 6c57ae497f..8b5f47c1b0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/ScriptTag_WithErrorSuppressed/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [144] x:\dir\subdir\Test\TestComponent.cshtml) - div
                     HtmlContent - (5:0,5 [6] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
index eeb80a1f60..16726f5372 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.RenderTree;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
index 902be776e5..4110afc7a7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [51] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.RenderTree
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 CSharpCode - (56:2,2 [134] x:\dir\subdir\Test\TestComponent.cshtml)
                     IntermediateToken - (56:2,2 [134] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    var output = string.Empty;\n    if (__builder == null) output = "Builder is null!";\n    else output = "Builder is not null!";\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
index 5086da6818..8dc476fe25 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeBlock/TestComponent.mappings.txt
@@ -4,7 +4,7 @@ Source Location: (56:2,2 [134] x:\dir\subdir\Test\TestComponent.cshtml)
     if (__builder == null) output = "Builder is null!";
     else output = "Builder is not null!";
 |
-Generated Location: (749:24,2 [134] )
+Generated Location: (757:24,2 [134] )
 |
     var output = string.Empty;
     if (__builder == null) output = "Builder is null!";
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
index e38b0e9e0a..112f0033d0 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.codegen.cs
@@ -15,7 +15,7 @@ using Microsoft.AspNetCore.Components.Rendering;
 #line default
 #line hidden
 #nullable disable
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
index 03c3279b6b..bcd50c61c7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.ir.txt
@@ -6,7 +6,7 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         UsingDirective - (1:0,1 [50] x:\dir\subdir\Test\TestComponent.cshtml) - Microsoft.AspNetCore.Components.Rendering
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
             CSharpCode - (60:2,7 [213] x:\dir\subdir\Test\TestComponent.cshtml)
                 IntermediateToken - (60:2,7 [213] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n    void RenderChildComponent(RenderTreeBuilder __builder)\n    {\n        var output = string.Empty;\n        if (__builder == null) output = "Builder is null!";\n        else output = "Builder is not null!";\n
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
index 33931628e4..05d990ee12 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/SingleLineControlFlowStatements_InCodeDirective/TestComponent.mappings.txt
@@ -6,7 +6,7 @@ Source Location: (60:2,7 [213] x:\dir\subdir\Test\TestComponent.cshtml)
         if (__builder == null) output = "Builder is null!";
         else output = "Builder is not null!";
 |
-Generated Location: (802:26,7 [213] )
+Generated Location: (810:26,7 [213] )
 |
     void RenderChildComponent(RenderTreeBuilder __builder)
     {
@@ -18,7 +18,7 @@ Generated Location: (802:26,7 [213] )
 Source Location: (305:9,0 [7] x:\dir\subdir\Test\TestComponent.cshtml)
 |    }
 |
-Generated Location: (1545:52,0 [7] )
+Generated Location: (1553:52,0 [7] )
 |    }
 |
 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
index a731c9cd0f..f5ef41e3b8 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
index 319f07784d..0ec96376e7 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithCSharpExpression/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello</h1>\n\n
                 CSharpExpression - (20:2,2 [10] x:\dir\subdir\Test\TestComponent.cshtml)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
index 6c615d6065..d1804d339d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
index f7adbb2050..5705f5828c 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithComponent/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello</h1>\n\n
                 Component - (18:2,0 [22] x:\dir\subdir\Test\TestComponent.cshtml) - SomeOtherComponent
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
index 4bbe2ae0ef..d319c30c28 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.codegen.cs
@@ -9,7 +9,7 @@ namespace Test
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
     [Microsoft.AspNetCore.Components.RouteAttribute("/my/url")]
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
index aba3ac5260..5be8a555b9 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/TrailingWhiteSpace_WithDirective/TestComponent.ir.txt
@@ -6,6 +6,6 @@ Document -
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
         RouteAttributeExtensionNode -  - /my/url
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <h1>Hello</h1>
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
index 5213196255..56f8b8e45d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
index f094db2671..4924d8da0d 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/WhiteSpace_InsideAttribute_InMarkupBlock/TestComponent.ir.txt
@@ -5,6 +5,6 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupBlock -  - <div class="first second">Hello</div>
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
index d83a551701..6ccca11c24 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.codegen.cs
@@ -8,7 +8,7 @@ namespace Test
     using System.Linq;
     using System.Threading.Tasks;
     using Microsoft.AspNetCore.Components;
-    public class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
+    public partial class TestComponent : Microsoft.AspNetCore.Components.ComponentBase
     {
         #pragma warning disable 1998
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder)
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
index ed2d4ed2e0..a01a9ef1cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.ir.txt
@@ -5,7 +5,7 @@ Document -
         UsingDirective - (53:3,1 [19] ) - System.Linq
         UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
         UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
-        ClassDeclaration -  - public - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
+        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
             MethodDeclaration -  - protected override - void - BuildRenderTree
                 MarkupElement - (0:0,0 [18] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                     HtmlAttribute - (5:0,5 [10] x:\dir\subdir\Test\TestComponent.cshtml) -  attr= - 
diff --git a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
index 9edc33678f..833739d291 100644
--- a/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/ComponentRuntimeCodeGenerationTest/Whitespace_BetweenElementAndFunctions/TestComponent.mappings.txt
@@ -2,7 +2,7 @@ Source Location: (31:1,11 [29] x:\dir\subdir\Test\TestComponent.cshtml)
 |
         int Foo = 18;
     |
-Generated Location: (923:30,11 [29] )
+Generated Location: (931:30,11 [29] )
 |
         int Foo = 18;
     |
diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.Component.targets b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.Component.targets
index 249603d2c7..b208426546 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.Component.targets
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.Component.targets
@@ -123,10 +123,6 @@ Copyright (c) .NET Foundation. All rights reserved.
     <ItemGroup>
       <FileWrites Include="@(_RazorComponentDeclaration)" />
     </ItemGroup>
-
-    <ItemGroup Condition="'$(DesignTimeBuild)'=='true'">
-      <Compile Include="@(_RazorComponentDeclaration)" />
-    </ItemGroup>
   </Target>
 
   <Target
diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.DesignTime.targets b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.DesignTime.targets
index b862d9f369..0b27cfce4a 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.DesignTime.targets
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.DesignTime.targets
@@ -47,20 +47,6 @@ Copyright (c) .NET Foundation. All rights reserved.
     <ProjectCapability Include="SupportsTypeScriptNuGet" />
   </ItemGroup>
 
-  <!--
-    For now we need to treat component files as if they have a single file generator. This will allow us
-    to trigger a workspace update for the declaration files when they change.
-  -->
-  <ItemGroup>
-    <Content Update="**\*.razor">
-      <Generator>MSBuild:RazorGenerateComponentDeclarationDesignTime</Generator>
-    </Content>
-
-    <Content Update="$(_RazorComponentInclude)">
-      <Generator>MSBuild:RazorGenerateComponentDeclarationDesignTime</Generator>
-    </Content>
-  </ItemGroup>
-
   <!--
     WebSdk imports these capabilities for nesting in DotNetCoreWeb projects.
     Conditinally import these capabilities if the project isn't targeting the WebSdk.