diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X/test/InjectTargetExtensionTest.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X/test/InjectTargetExtensionTest.cs
index fcc8b1123c..ec314d03f6 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X/test/InjectTargetExtensionTest.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X/test/InjectTargetExtensionTest.cs
@@ -56,12 +56,14 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X
             target.WriteInjectProperty(context, node);
 
             // Assert
-            Assert.Equal(
+            Assert.Equal(Environment.NewLine +
+                "#nullable restore" + Environment.NewLine +
                 "#line 2 \"test-path\"" + Environment.NewLine +
                 "[global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]" + Environment.NewLine +
                 "public PropertyType<ModelType> PropertyName { get; private set; }" + Environment.NewLine + Environment.NewLine +
                 "#line default" + Environment.NewLine +
-                "#line hidden" + Environment.NewLine,
+                "#line hidden" + Environment.NewLine +
+                "#nullable disable" + Environment.NewLine,
                 context.CodeWriter.GenerateCode());
         }
     }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X/test/InjectTargetExtensionTest.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X/test/InjectTargetExtensionTest.cs
index 71b2ec20ce..53e7debcf7 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X/test/InjectTargetExtensionTest.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X/test/InjectTargetExtensionTest.cs
@@ -56,12 +56,14 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X
             target.WriteInjectProperty(context, node);
 
             // Assert
-            Assert.Equal(
+            Assert.Equal(Environment.NewLine +
+                "#nullable restore" + Environment.NewLine +
                 "#line 2 \"test-path\"" + Environment.NewLine +
                 "[global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]" + Environment.NewLine +
                 "public PropertyType<ModelType> PropertyName { get; private set; }" + Environment.NewLine + Environment.NewLine +
                 "#line default" + Environment.NewLine +
-                "#line hidden" + Environment.NewLine,
+                "#line hidden" + Environment.NewLine +
+                "#nullable disable" + Environment.NewLine,
                 context.CodeWriter.GenerateCode());
         }
     }
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 ee8a246582..df40a48d8d 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
@@ -14,11 +14,13 @@ namespace __GeneratedComponent
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml"
 IDisposable __typeHelper = default(IDisposable);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -30,24 +32,30 @@ IDisposable __typeHelper = default(IDisposable);
         protected override void BuildRenderTree(Microsoft.AspNetCore.Components.RenderTree.RenderTreeBuilder builder)
         {
             base.BuildRenderTree(builder);
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml"
        __o = this.ToString();
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml"
 __o = string.Format("{0}", "Hello");
 
 #line default
 #line hidden
+#nullable disable
         }
         #pragma warning restore 1998
+#nullable restore
 #line 7 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml"
             
     void IDisposable.Dispose(){ }
 
 #line default
 #line hidden
+#nullable disable
     }
 }
 #pragma warning restore 1591
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 9220571512..ee0bc772d7 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: (665:17,0 [11] )
+Generated Location: (684:18,0 [11] )
 |IDisposable|
 
 Source Location: (38:1,13 [15] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |this.ToString()|
-Generated Location: (1261:33,13 [15] )
+Generated Location: (1318:36,13 [15] )
 |this.ToString()|
 
 Source Location: (79:3,5 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |string.Format("{0}", "Hello")|
-Generated Location: (1406:38,6 [29] )
+Generated Location: (1501:43,6 [29] )
 |string.Format("{0}", "Hello")|
 
 Source Location: (132:6,12 [37] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml)
 |
     void IDisposable.Dispose(){ }
 |
-Generated Location: (1620:45,12 [37] )
+Generated Location: (1753:52,12 [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 63ec0d9879..37e1ce772c 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
@@ -23,12 +23,14 @@ namespace __GeneratedComponent
             builder.CloseElement();
         }
         #pragma warning restore 1998
+#nullable restore
 #line 7 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/BasicComponent.cshtml"
             
     void IDisposable.Dispose(){ }
 
 #line default
 #line hidden
+#nullable disable
     }
 }
 #pragma warning restore 1591
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.codegen.cs
index d39b64c26d..48a1f5fdba 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.codegen.cs
@@ -23,37 +23,49 @@ namespace AspNetCore
         #pragma warning disable 1998
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
        __o = this.ToString();
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
 __o = string.Format("{0}", "Hello");
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
    
     var cls = "foo";
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
            if(cls != null) { 
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
                         __o = cls;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
                                   }
 
 #line default
 #line hidden
+#nullable disable
         }
         #pragma warning restore 1998
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.mappings.txt
index 372b49cb6f..5c0927db71 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_DesignTime.mappings.txt
@@ -1,34 +1,34 @@
 Source Location: (13:0,13 [15] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 |this.ToString()|
-Generated Location: (1030:26,13 [15] )
+Generated Location: (1049:27,13 [15] )
 |this.ToString()|
 
 Source Location: (54:2,5 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 |string.Format("{0}", "Hello")|
-Generated Location: (1166:31,6 [29] )
+Generated Location: (1223:34,6 [29] )
 |string.Format("{0}", "Hello")|
 
 Source Location: (95:4,2 [25] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 | 
     var cls = "foo";
 |
-Generated Location: (1312:36,2 [25] )
+Generated Location: (1407:41,2 [25] )
 | 
     var cls = "foo";
 |
 
 Source Location: (134:7,11 [18] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 |if(cls != null) { |
-Generated Location: (1460:42,11 [18] )
+Generated Location: (1593:49,11 [18] )
 |if(cls != null) { |
 
 Source Location: (153:7,30 [3] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 |cls|
-Generated Location: (1622:47,30 [3] )
+Generated Location: (1793:56,30 [3] )
 |cls|
 
 Source Location: (156:7,33 [2] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml)
 | }|
-Generated Location: (1773:52,33 [2] )
+Generated Location: (1982:63,33 [2] )
 | }|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_Runtime.codegen.cs
index b6640c206d..1885fba68a 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic_Runtime.codegen.cs
@@ -20,44 +20,56 @@ namespace AspNetCore
         {
             WriteLiteral("<div");
             BeginWriteAttribute("class", " class=\"", 4, "\"", 28, 1);
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
 WriteAttributeValue("", 12, this.ToString(), 12, 16, false);
 
 #line default
 #line hidden
+#nullable disable
             EndWriteAttribute();
             WriteLiteral(">\r\n    Hello world\r\n    ");
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
 Write(string.Format("{0}", "Hello"));
 
 #line default
 #line hidden
+#nullable disable
             WriteLiteral("\r\n</div>\r\n");
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
    
     var cls = "foo";
 
 #line default
 #line hidden
+#nullable disable
             WriteLiteral("<p");
             BeginWriteAttribute("class", " class=\"", 125, "\"", 158, 1);
             WriteAttributeValue("", 133, new Microsoft.AspNetCore.Mvc.Razor.HelperResult(async(__razor_attribute_value_writer) => {
                 PushWriter(__razor_attribute_value_writer);
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
            if(cls != null) { 
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
                         Write(cls);
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Basic.cshtml"
                                   }
 
 #line default
 #line hidden
+#nullable disable
                 PopWriter();
             }
             ), 133, 25, false);
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.codegen.cs
index 0e78caebf8..8f5be40d38 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.codegen.cs
@@ -16,67 +16,83 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 7 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 8 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 10 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 11 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 12 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
 MyService<TModel> __typeHelper = default(MyService<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 12 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 14 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 15 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml"
  
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.mappings.txt
index f7d4a23a9b..b73427b4fc 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives_DesignTime.mappings.txt
@@ -1,40 +1,40 @@
 Source Location: (119:6,6 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (767:19,0 [0] )
+Generated Location: (786:20,0 [0] )
 ||
 
 Source Location: (128:7,7 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (957:27,0 [0] )
+Generated Location: (1014:30,0 [0] )
 ||
 
 Source Location: (139:9,7 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (1148:35,0 [0] )
+Generated Location: (1243:40,0 [0] )
 ||
 
 Source Location: (149:10,8 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (1339:43,0 [0] )
+Generated Location: (1472:50,0 [0] )
 ||
 
 Source Location: (159:11,8 [17] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 |MyService<TModel>|
-Generated Location: (1530:51,0 [17] )
+Generated Location: (1701:60,0 [17] )
 |MyService<TModel>|
 
 Source Location: (176:11,25 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (1780:59,0 [0] )
+Generated Location: (1989:70,0 [0] )
 ||
 
 Source Location: (190:13,10 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (1971:67,0 [0] )
+Generated Location: (2218:80,0 [0] )
 ||
 
 Source Location: (203:14,11 [0] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/IncompleteDirectives.cshtml)
 ||
-Generated Location: (2162:75,0 [0] )
+Generated Location: (2447:90,0 [0] )
 ||
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.codegen.cs
index 7cdbaf3326..5df4e38e8c 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.codegen.cs
@@ -16,19 +16,23 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel.cshtml"
 MyBasePageForViews<TModel> __typeHelper = default(MyBasePageForViews<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel.cshtml"
 MyModel __typeHelper = default(MyModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.mappings.txt
index 6a313a909d..e8601673e4 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel_DesignTime.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (10:0,10 [26] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel.cshtml)
 |MyBasePageForViews<TModel>|
-Generated Location: (740:19,0 [26] )
+Generated Location: (759:20,0 [26] )
 |MyBasePageForViews<TModel>|
 
 Source Location: (45:1,7 [7] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsViewModel.cshtml)
 |MyModel|
-Generated Location: (1004:27,0 [7] )
+Generated Location: (1061:30,0 [7] )
 |MyModel|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.codegen.cs
index f174a0fc2f..854bc5acf7 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.codegen.cs
@@ -16,11 +16,13 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports.cshtml"
 MyModel __typeHelper = default(MyModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.mappings.txt
index e7daecd874..2aefff4635 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports_DesignTime.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (14:1,7 [7] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InheritsWithViewImports.cshtml)
 |MyModel|
-Generated Location: (745:19,0 [7] )
+Generated Location: (764:20,0 [7] )
 |MyModel|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.codegen.cs
index 2120622373..6eb2a04465 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.codegen.cs
@@ -16,43 +16,53 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml"
 MyModel __typeHelper = default(MyModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml"
 MyApp __typeHelper = default(MyApp);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml"
 global::System.Object MyPropertyName = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml"
 MyService<TModel> __typeHelper = default(MyService<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml"
 global::System.Object Html = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.mappings.txt
index c4838ff64d..2aa53d9a49 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel_DesignTime.mappings.txt
@@ -1,25 +1,25 @@
 Source Location: (7:0,7 [7] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml)
 |MyModel|
-Generated Location: (766:19,0 [7] )
+Generated Location: (785:20,0 [7] )
 |MyModel|
 
 Source Location: (24:1,8 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml)
 |MyApp|
-Generated Location: (990:27,0 [5] )
+Generated Location: (1047:30,0 [5] )
 |MyApp|
 
 Source Location: (30:1,14 [14] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml)
 |MyPropertyName|
-Generated Location: (1232:35,22 [14] )
+Generated Location: (1327:40,22 [14] )
 |MyPropertyName|
 
 Source Location: (54:2,8 [17] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml)
 |MyService<TModel>|
-Generated Location: (1438:43,0 [17] )
+Generated Location: (1571:50,0 [17] )
 |MyService<TModel>|
 
 Source Location: (72:2,26 [4] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithModel.cshtml)
 |Html|
-Generated Location: (1704:51,22 [4] )
+Generated Location: (1875:60,22 [4] )
 |Html|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.codegen.cs
index ea95a4e7eb..23c1be5972 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.codegen.cs
@@ -16,75 +16,93 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 MyModel __typeHelper = default(MyModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 MyApp __typeHelper = default(MyApp);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 global::System.Object MyPropertyName = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 MyService<TModel> __typeHelper = default(MyService<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 global::System.Object Html = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 MyApp __typeHelper = default(MyApp);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 global::System.Object MyPropertyName2 = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 MyService<TModel> __typeHelper = default(MyService<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml"
 global::System.Object Html2 = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.mappings.txt
index 6a90f75f3e..fd3c9832d8 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon_DesignTime.mappings.txt
@@ -1,45 +1,45 @@
 Source Location: (7:0,7 [7] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyModel|
-Generated Location: (774:19,0 [7] )
+Generated Location: (793:20,0 [7] )
 |MyModel|
 
 Source Location: (24:1,8 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyApp|
-Generated Location: (1002:27,0 [5] )
+Generated Location: (1059:30,0 [5] )
 |MyApp|
 
 Source Location: (30:1,14 [14] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyPropertyName|
-Generated Location: (1248:35,22 [14] )
+Generated Location: (1343:40,22 [14] )
 |MyPropertyName|
 
 Source Location: (58:2,8 [17] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyService<TModel>|
-Generated Location: (1458:43,0 [17] )
+Generated Location: (1591:50,0 [17] )
 |MyService<TModel>|
 
 Source Location: (76:2,26 [4] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |Html|
-Generated Location: (1728:51,22 [4] )
+Generated Location: (1899:60,22 [4] )
 |Html|
 
 Source Location: (93:3,8 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyApp|
-Generated Location: (1928:59,0 [5] )
+Generated Location: (2137:70,0 [5] )
 |MyApp|
 
 Source Location: (99:3,14 [15] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyPropertyName2|
-Generated Location: (2174:67,22 [15] )
+Generated Location: (2421:80,22 [15] )
 |MyPropertyName2|
 
 Source Location: (129:4,8 [17] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |MyService<TModel>|
-Generated Location: (2385:75,0 [17] )
+Generated Location: (2670:90,0 [17] )
 |MyService<TModel>|
 
 Source Location: (147:4,26 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/InjectWithSemicolon.cshtml)
 |Html2|
-Generated Location: (2655:83,22 [5] )
+Generated Location: (2978:100,22 [5] )
 |Html2|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.codegen.cs
index 7b2f4fedc6..65d978634b 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.codegen.cs
@@ -16,19 +16,23 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject.cshtml"
 MyApp __typeHelper = default(MyApp);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject.cshtml"
 global::System.Object MyPropertyName = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.mappings.txt
index 10ed356ecf..e78674c121 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject_DesignTime.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (8:0,8 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject.cshtml)
 |MyApp|
-Generated Location: (748:19,0 [5] )
+Generated Location: (767:20,0 [5] )
 |MyApp|
 
 Source Location: (14:0,14 [14] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Inject.cshtml)
 |MyPropertyName|
-Generated Location: (981:27,22 [14] )
+Generated Location: (1038:30,22 [14] )
 |MyPropertyName|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.codegen.cs
index 82441cd663..6c0bfbaa8c 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.codegen.cs
@@ -17,19 +17,23 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 DateTime __typeHelper = default(DateTime);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 global::System.Object __typeHelper = "InputTestTagHelper, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -41,17 +45,21 @@ global::System.Object __typeHelper = "InputTestTagHelper, AppCode";
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
             __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => __model.Date);
 
 #line default
 #line hidden
+#nullable disable
             __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => Model);
 
 #line default
 #line hidden
+#nullable disable
         }
         #pragma warning restore 1998
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.mappings.txt
index 63a7d6ccc1..100abb1b5c 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_DesignTime.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (7:0,7 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml)
 |DateTime|
-Generated Location: (851:20,0 [8] )
+Generated Location: (870:21,0 [8] )
 |DateTime|
 
 Source Location: (33:2,14 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml)
 |"InputTestTagHelper, AppCode"|
-Generated Location: (1123:28,37 [29] )
+Generated Location: (1180:31,37 [29] )
 |"InputTestTagHelper, AppCode"|
 
 Source Location: (83:4,17 [4] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml)
 |Date|
-Generated Location: (1802:44,102 [4] )
+Generated Location: (1897:49,102 [4] )
 |Date|
 
 Source Location: (111:5,18 [5] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml)
 |Model|
-Generated Location: (2118:50,94 [5] )
+Generated Location: (2251:57,94 [5] )
 |Model|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_Runtime.codegen.cs
index 8f900536ac..0e7defef2d 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper_Runtime.codegen.cs
@@ -44,11 +44,13 @@ namespace AspNetCore
             );
             __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
             __tagHelperExecutionContext.Add(__InputTestTagHelper);
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => __model.Date);
 
 #line default
 #line hidden
+#nullable disable
             __tagHelperExecutionContext.AddTagHelperAttribute("for", __InputTestTagHelper.For, global::Microsoft.AspNetCore.Razor.TagHelpers.HtmlAttributeValueStyle.DoubleQuotes);
             await __tagHelperRunner.RunAsync(__tagHelperExecutionContext);
             if (!__tagHelperExecutionContext.Output.IsContentModified)
@@ -63,11 +65,13 @@ __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewDat
             );
             __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
             __tagHelperExecutionContext.Add(__InputTestTagHelper);
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ModelExpressionTagHelper.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => Model);
 
 #line default
 #line hidden
+#nullable disable
             __tagHelperExecutionContext.AddTagHelperAttribute("for", __InputTestTagHelper.For, global::Microsoft.AspNetCore.Razor.TagHelpers.HtmlAttributeValueStyle.DoubleQuotes);
             await __tagHelperRunner.RunAsync(__tagHelperExecutionContext);
             if (!__tagHelperExecutionContext.Output.IsContentModified)
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.codegen.cs
index 63c2a52c6f..bc7f027902 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.codegen.cs
@@ -16,11 +16,13 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model.cshtml"
 System.Collections.IEnumerable __typeHelper = default(System.Collections.IEnumerable);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.mappings.txt
index 7d84cf754d..5328a5fda4 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model_DesignTime.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (7:0,7 [30] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Model.cshtml)
 |System.Collections.IEnumerable|
-Generated Location: (769:19,0 [30] )
+Generated Location: (788:20,0 [30] )
 |System.Collections.IEnumerable|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.codegen.cs
index e8f705cef7..648d6a810f 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.codegen.cs
@@ -16,19 +16,23 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels.cshtml"
 ThisShouldBeGenerated __typeHelper = default(ThisShouldBeGenerated);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels.cshtml"
 System.Collections.IEnumerable __typeHelper = default(System.Collections.IEnumerable);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.mappings.txt
index 79d7e257c7..9f3cb96a3e 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels_DesignTime.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (7:0,7 [21] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels.cshtml)
 |ThisShouldBeGenerated|
-Generated Location: (778:19,0 [21] )
+Generated Location: (797:20,0 [21] )
 |ThisShouldBeGenerated|
 
 Source Location: (37:1,7 [30] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/MultipleModels.cshtml)
 |System.Collections.IEnumerable|
-Generated Location: (1029:27,0 [30] )
+Generated Location: (1086:30,0 [30] )
 |System.Collections.IEnumerable|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.codegen.cs
index 9d7181bfad..8ef243c98e 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.codegen.cs
@@ -16,11 +16,13 @@ namespace Test.Namespace
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace.cshtml"
 global::System.Object __typeHelper = nameof(Test.Namespace);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.mappings.txt
index b41240c9c5..74d9dc1432 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace_DesignTime.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (18:1,11 [14] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/PageWithNamespace.cshtml)
 |Test.Namespace|
-Generated Location: (809:19,44 [14] )
+Generated Location: (828:20,44 [14] )
 |Test.Namespace|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.codegen.cs
index 8f5d082e6a..e66684b63d 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.codegen.cs
@@ -11,30 +11,36 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorCompiledItemMetadataAttribute("RouteTemplate", "/About")]
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPagesWithRouteTemplate : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
     {
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
 global::System.Object __typeHelper = "/About";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
 NewModel __typeHelper = default(NewModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -45,13 +51,16 @@ NewModel __typeHelper = default(NewModel);
         #pragma warning disable 1998
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
+#nullable restore
 #line 13 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
             __o = Model.Name;
 
 #line default
 #line hidden
+#nullable disable
         }
         #pragma warning restore 1998
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
             
     public class NewModel : PageModel
@@ -61,6 +70,7 @@ NewModel __typeHelper = default(NewModel);
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.mappings.txt
index cc5e9cad30..9485855d23 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_DesignTime.mappings.txt
@@ -1,21 +1,21 @@
 Source Location: (36:3,1 [41] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml)
 |using Microsoft.AspNetCore.Mvc.RazorPages|
-Generated Location: (492:14,0 [41] )
+Generated Location: (511:15,0 [41] )
 |using Microsoft.AspNetCore.Mvc.RazorPages|
 
 Source Location: (6:0,6 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml)
 |"/About"|
-Generated Location: (1108:25,37 [8] )
+Generated Location: (1165:28,37 [8] )
 |"/About"|
 
 Source Location: (25:2,7 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml)
 |NewModel|
-Generated Location: (1313:33,0 [8] )
+Generated Location: (1408:38,0 [8] )
 |NewModel|
 
 Source Location: (213:12,18 [10] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml)
 |Model.Name|
-Generated Location: (1841:48,18 [10] )
+Generated Location: (1974:55,18 [10] )
 |Model.Name|
 
 Source Location: (93:5,12 [97] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml)
@@ -25,7 +25,7 @@ Source Location: (93:5,12 [97] TestFiles/IntegrationTests/CodeGenerationIntegrat
         public string Name { get; set; }
     }
 |
-Generated Location: (2049:55,12 [97] )
+Generated Location: (2220:64,12 [97] )
 |
     public class NewModel : PageModel
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_Runtime.codegen.cs
index d61cd1b60b..eb6860f4b3 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate_Runtime.codegen.cs
@@ -12,11 +12,13 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorCompiledItemMetadataAttribute("RouteTemplate", "/About")]
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorSourceChecksumAttribute(@"SHA1", @"547900310554f446d88da593a245719ee9dbb12f", @"/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml")]
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPagesWithRouteTemplate : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
@@ -27,14 +29,17 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
             WriteLiteral("\r\n");
             WriteLiteral("\r\n");
             WriteLiteral("\r\n<h1>New Customer ");
+#nullable restore
 #line 13 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
             Write(Model.Name);
 
 #line default
 #line hidden
+#nullable disable
             WriteLiteral("</h1>\r\n");
         }
         #pragma warning restore 1998
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithRouteTemplate.cshtml"
             
     public class NewModel : PageModel
@@ -44,6 +49,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.codegen.cs
index aeb2631c46..b0f5beb1a9 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.codegen.cs
@@ -11,22 +11,26 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPagesWithoutModel : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
     {
         private global::DivTagHelper __DivTagHelper;
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
 global::System.Object __typeHelper = "*, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -38,17 +42,20 @@ global::System.Object __typeHelper = "*, AppCode";
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
+#nullable restore
 #line 25 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
                                          __o = Name;
 
 #line default
 #line hidden
+#nullable disable
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
         }
         #pragma warning restore 1998
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
             
     public IActionResult OnPost(Customer customer)
@@ -66,6 +73,7 @@ global::System.Object __typeHelper = "*, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.mappings.txt
index 33f7baa377..3a67aa86ef 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_DesignTime.mappings.txt
@@ -1,16 +1,16 @@
 Source Location: (38:3,1 [41] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml)
 |using Microsoft.AspNetCore.Mvc.RazorPages|
-Generated Location: (487:14,0 [41] )
+Generated Location: (506:15,0 [41] )
 |using Microsoft.AspNetCore.Mvc.RazorPages|
 
 Source Location: (23:2,14 [12] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml)
 |"*, AppCode"|
-Generated Location: (1035:25,37 [12] )
+Generated Location: (1092:28,37 [12] )
 |"*, AppCode"|
 
 Source Location: (566:24,47 [4] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml)
 |Name|
-Generated Location: (1629:41,47 [4] )
+Generated Location: (1724:46,47 [4] )
 |Name|
 
 Source Location: (95:5,12 [283] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml)
@@ -28,7 +28,7 @@ Source Location: (95:5,12 [283] TestFiles/IntegrationTests/CodeGenerationIntegra
         public string Name { get; set; }
     }
 |
-Generated Location: (2110:52,12 [283] )
+Generated Location: (2243:59,12 [283] )
 |
     public IActionResult OnPost(Customer customer)
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_Runtime.codegen.cs
index c4f7c2473f..e001e0593c 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel_Runtime.codegen.cs
@@ -12,11 +12,13 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorSourceChecksumAttribute(@"SHA1", @"8bf3954ad78688478de155359db8af32627ee2b8", @"/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml")]
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPagesWithoutModel : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
     {
@@ -65,11 +67,13 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
             WriteLiteral("\r\n    ");
             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("div", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
                 WriteLiteral("\r\n        <label class=\"col-md-2 control-label\">");
+#nullable restore
 #line 25 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
                                          Write(Name);
 
 #line default
 #line hidden
+#nullable disable
                 WriteLiteral("</label>\r\n        ");
                 __tagHelperExecutionContext = __tagHelperScopeManager.Begin("div", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
                     WriteLiteral("\r\n            <input class=\"form-control\" />\r\n            <span class=\"text-danger\"></span>\r\n        ");
@@ -131,6 +135,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
             WriteLiteral("\r\n</form>\r\n");
         }
         #pragma warning restore 1998
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPagesWithoutModel.cshtml"
             
     public IActionResult OnPost(Customer customer)
@@ -148,6 +153,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.codegen.cs
index d7acbdf7d1..8cd1703ea8 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.codegen.cs
@@ -11,30 +11,36 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPages : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
     {
         private global::DivTagHelper __DivTagHelper;
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
 NewModel __typeHelper = default(NewModel);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
 global::System.Object __typeHelper = "*, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -46,17 +52,20 @@ global::System.Object __typeHelper = "*, AppCode";
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
+#nullable restore
 #line 29 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
                                          __o = Model.Name;
 
 #line default
 #line hidden
+#nullable disable
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
             __DivTagHelper = CreateTagHelper<global::DivTagHelper>();
         }
         #pragma warning restore 1998
+#nullable restore
 #line 7 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
             
     public class NewModel : PageModel
@@ -77,6 +86,7 @@ global::System.Object __typeHelper = "*, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.mappings.txt
index 0af8c77dfd..a01ff719cf 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_DesignTime.mappings.txt
@@ -1,21 +1,21 @@
 Source Location: (55:4,1 [41] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml)
 |using Microsoft.AspNetCore.Mvc.RazorPages|
-Generated Location: (475:14,0 [41] )
+Generated Location: (494:15,0 [41] )
 |using Microsoft.AspNetCore.Mvc.RazorPages|
 
 Source Location: (16:2,7 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml)
 |NewModel|
-Generated Location: (962:25,0 [8] )
+Generated Location: (1019:28,0 [8] )
 |NewModel|
 
 Source Location: (40:3,14 [12] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml)
 |"*, AppCode"|
-Generated Location: (1220:33,37 [12] )
+Generated Location: (1315:38,37 [12] )
 |"*, AppCode"|
 
 Source Location: (661:28,47 [10] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml)
 |Model.Name|
-Generated Location: (1802:49,47 [10] )
+Generated Location: (1935:56,47 [10] )
 |Model.Name|
 
 Source Location: (112:6,12 [360] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml)
@@ -36,7 +36,7 @@ Source Location: (112:6,12 [360] TestFiles/IntegrationTests/CodeGenerationIntegr
         public string Name { get; set; }
     }
 |
-Generated Location: (2277:60,12 [360] )
+Generated Location: (2448:69,12 [360] )
 |
     public class NewModel : PageModel
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_Runtime.codegen.cs
index 856f8eb8ee..3ab0b40633 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages_Runtime.codegen.cs
@@ -12,11 +12,13 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
 using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorSourceChecksumAttribute(@"SHA1", @"d33caff161b646a61b273d7c544111395b652557", @"/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml")]
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_RazorPages : global::Microsoft.AspNetCore.Mvc.RazorPages.Page
     {
@@ -65,11 +67,13 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
             WriteLiteral("\r\n    ");
             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("div", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
                 WriteLiteral("\r\n        <label class=\"col-md-2 control-label\">");
+#nullable restore
 #line 29 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
                                          Write(Model.Name);
 
 #line default
 #line hidden
+#nullable disable
                 WriteLiteral("</label>\r\n        ");
                 __tagHelperExecutionContext = __tagHelperScopeManager.Begin("div", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
                     WriteLiteral("\r\n            <input class=\"form-control\" />\r\n            <span class=\"text-danger\"></span>\r\n        ");
@@ -131,6 +135,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
             WriteLiteral("\r\n</form>\r\n");
         }
         #pragma warning restore 1998
+#nullable restore
 #line 7 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/RazorPages.cshtml"
             
     public class NewModel : PageModel
@@ -151,6 +156,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
 
 #line default
 #line hidden
+#nullable disable
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
         public global::Microsoft.AspNetCore.Mvc.ViewFeatures.IModelExpressionProvider ModelExpressionProvider { get; private set; }
         [global::Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.codegen.cs
index 3ca46af8a7..9d1e2bf58d 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.codegen.cs
@@ -17,27 +17,33 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
 DateTime __typeHelper = default(DateTime);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
 global::System.Object __typeHelper = "InputTestTagHelper, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 11 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
 global::System.Object Section1 = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -48,19 +54,23 @@ global::System.Object Section1 = null;
         #pragma warning disable 1998
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
    
     Layout = "_SectionTestLayout.cshtml";
 
 #line default
 #line hidden
+#nullable disable
             DefineSection("Section1", async(__razor_section_writer) => {
                 __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
+#nullable restore
 #line 13 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => __model.Date);
 
 #line default
 #line hidden
+#nullable disable
             }
             );
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.mappings.txt
index 1cc991810c..f97fc02e0b 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_DesignTime.mappings.txt
@@ -1,29 +1,29 @@
 Source Location: (7:0,7 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml)
 |DateTime|
-Generated Location: (819:20,0 [8] )
+Generated Location: (838:21,0 [8] )
 |DateTime|
 
 Source Location: (33:2,14 [29] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml)
 |"InputTestTagHelper, AppCode"|
-Generated Location: (1075:28,37 [29] )
+Generated Location: (1132:31,37 [29] )
 |"InputTestTagHelper, AppCode"|
 
 Source Location: (152:10,9 [8] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml)
 |Section1|
-Generated Location: (1305:36,22 [8] )
+Generated Location: (1400:41,22 [8] )
 |Section1|
 
 Source Location: (68:4,2 [46] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml)
 | 
     Layout = "_SectionTestLayout.cshtml";
 |
-Generated Location: (1771:51,2 [46] )
+Generated Location: (1904:58,2 [46] )
 | 
     Layout = "_SectionTestLayout.cshtml";
 |
 
 Source Location: (222:12,21 [4] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml)
 |Date|
-Generated Location: (2196:59,102 [4] )
+Generated Location: (2367:68,102 [4] )
 |Date|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_Runtime.codegen.cs
index 4366057292..85c27277e5 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections_Runtime.codegen.cs
@@ -39,12 +39,14 @@ namespace AspNetCore
         {
             WriteLiteral("\r\n");
             WriteLiteral("\r\n");
+#nullable restore
 #line 5 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
    
     Layout = "_SectionTestLayout.cshtml";
 
 #line default
 #line hidden
+#nullable disable
             WriteLiteral("\r\n<div>Some body</div>\r\n\r\n");
             DefineSection("Section1", async() => {
                 WriteLiteral("\r\n    <div>This is in Section 1</div>\r\n    ");
@@ -53,11 +55,13 @@ namespace AspNetCore
                 );
                 __InputTestTagHelper = CreateTagHelper<global::InputTestTagHelper>();
                 __tagHelperExecutionContext.Add(__InputTestTagHelper);
+#nullable restore
 #line 13 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Sections.cshtml"
 __InputTestTagHelper.For = ModelExpressionProvider.CreateModelExpression(ViewData, __model => __model.Date);
 
 #line default
 #line hidden
+#nullable disable
                 __tagHelperExecutionContext.AddTagHelperAttribute("for", __InputTestTagHelper.For, global::Microsoft.AspNetCore.Razor.TagHelpers.HtmlAttributeValueStyle.DoubleQuotes);
                 await __tagHelperRunner.RunAsync(__tagHelperExecutionContext);
                 if (!__tagHelperExecutionContext.Output.IsContentModified)
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.codegen.cs
index ad57e4a82b..11eff28154 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.codegen.cs
@@ -10,26 +10,34 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System.ComponentModel;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System.Collections;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System;
 
 #line default
 #line hidden
+#nullable disable
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_UsingDirectives : global::Microsoft.AspNetCore.Mvc.Razor.RazorPage<dynamic>
     {
         #pragma warning disable 219
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.mappings.txt
index 71a6bf2b2d..4337c16790 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_DesignTime.mappings.txt
@@ -1,20 +1,20 @@
 Source Location: (1:0,1 [27] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml)
 |using System.ComponentModel|
-Generated Location: (461:13,0 [27] )
+Generated Location: (480:14,0 [27] )
 |using System.ComponentModel|
 
 Source Location: (31:1,1 [24] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml)
 |using System.Collections|
-Generated Location: (613:18,0 [24] )
+Generated Location: (670:21,0 [24] )
 |using System.Collections|
 
 Source Location: (58:2,1 [12] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml)
 |using System|
-Generated Location: (762:23,0 [12] )
+Generated Location: (857:28,0 [12] )
 |using System|
 
 Source Location: (73:3,1 [12] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml)
 |using System|
-Generated Location: (899:28,0 [12] )
+Generated Location: (1032:35,0 [12] )
 |using System|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_Runtime.codegen.cs
index 4b1e4e8805..9cd56d20e2 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives_Runtime.codegen.cs
@@ -11,26 +11,34 @@ namespace AspNetCore
     using Microsoft.AspNetCore.Mvc;
     using Microsoft.AspNetCore.Mvc.Rendering;
     using Microsoft.AspNetCore.Mvc.ViewFeatures;
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System.ComponentModel;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System.Collections;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 3 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System;
 
 #line default
 #line hidden
+#nullable disable
+#nullable restore
 #line 4 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml"
 using System;
 
 #line default
 #line hidden
+#nullable disable
     [global::Microsoft.AspNetCore.Razor.Hosting.RazorSourceChecksumAttribute(@"SHA1", @"452979e8e4dd77a84a4c50425dd3a162e265990d", @"/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/UsingDirectives.cshtml")]
     public class TestFiles_IntegrationTests_CodeGenerationIntegrationTest_UsingDirectives : global::Microsoft.AspNetCore.Mvc.Razor.RazorPage<dynamic>
     {
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.codegen.cs
index b6196f6651..02339582f9 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.codegen.cs
@@ -18,11 +18,13 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml"
 global::System.Object __typeHelper = "*, AppCode";
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
@@ -33,19 +35,23 @@ global::System.Object __typeHelper = "*, AppCode";
         #pragma warning disable 1998
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml"
   
     var foo = "Hello";
 
 #line default
 #line hidden
+#nullable disable
             __AllTagHelper = CreateTagHelper<global::AllTagHelper>();
             __TestViewComponentTagHelper = CreateTagHelper<global::AspNetCore.TestFiles_IntegrationTests_CodeGenerationIntegrationTest_ViewComponentTagHelper.__Generated__TestViewComponentTagHelper>();
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml"
                 __o = foo;
 
 #line default
 #line hidden
+#nullable disable
             __TestViewComponentTagHelper.firstName = string.Empty;
             __AllTagHelper.Bar = " World";
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.mappings.txt
index 9c5fd32efb..2fe93f8a9e 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_DesignTime.mappings.txt
@@ -1,19 +1,19 @@
 Source Location: (14:0,14 [12] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml)
 |"*, AppCode"|
-Generated Location: (1057:21,37 [12] )
+Generated Location: (1076:22,37 [12] )
 |"*, AppCode"|
 
 Source Location: (30:1,2 [26] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml)
 |
     var foo = "Hello";
 |
-Generated Location: (1534:36,2 [26] )
+Generated Location: (1591:39,2 [26] )
 |
     var foo = "Hello";
 |
 
 Source Location: (83:5,22 [3] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml)
 |foo|
-Generated Location: (1985:44,22 [3] )
+Generated Location: (2080:49,22 [3] )
 |foo|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_Runtime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_Runtime.codegen.cs
index 002512387b..e4c78739e2 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_Runtime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper_Runtime.codegen.cs
@@ -39,12 +39,14 @@ namespace AspNetCore
         #pragma warning disable 1998
         public async override global::System.Threading.Tasks.Task ExecuteAsync()
         {
+#nullable restore
 #line 2 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml"
   
     var foo = "Hello";
 
 #line default
 #line hidden
+#nullable disable
             WriteLiteral("\r\n");
             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("vc:test", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
             }
@@ -54,11 +56,13 @@ namespace AspNetCore
             __TestViewComponentTagHelper = CreateTagHelper<global::AspNetCore.TestFiles_IntegrationTests_CodeGenerationIntegrationTest_ViewComponentTagHelper.__Generated__TestViewComponentTagHelper>();
             __tagHelperExecutionContext.Add(__TestViewComponentTagHelper);
             BeginWriteTagHelperAttribute();
+#nullable restore
 #line 6 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewComponentTagHelper.cshtml"
          WriteLiteral(foo);
 
 #line default
 #line hidden
+#nullable disable
             __tagHelperStringValueBuffer = EndWriteTagHelperAttribute();
             __TestViewComponentTagHelper.firstName = __tagHelperStringValueBuffer;
             __tagHelperExecutionContext.AddTagHelperAttribute("first-name", __TestViewComponentTagHelper.firstName, global::Microsoft.AspNetCore.Razor.TagHelpers.HtmlAttributeValueStyle.DoubleQuotes);
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.codegen.cs
index 209d3361f0..4f9c742ead 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.codegen.cs
@@ -16,11 +16,13 @@ namespace Test.Namespace
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace.cshtml"
 global::System.Object __typeHelper = nameof(Test.Namespace);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.mappings.txt
index 2b7a295e01..927c17b475 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace_DesignTime.mappings.txt
@@ -1,5 +1,5 @@
 Source Location: (11:0,11 [14] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/ViewWithNamespace.cshtml)
 |Test.Namespace|
-Generated Location: (818:19,44 [14] )
+Generated Location: (837:20,44 [14] )
 |Test.Namespace|
 
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.codegen.cs b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.codegen.cs
index 1f60d924cc..7a5e5b43f0 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.codegen.cs
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.codegen.cs
@@ -16,19 +16,23 @@ namespace AspNetCore
         #pragma warning disable 219
         private void __RazorDirectiveTokenHelpers__() {
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports.cshtml"
 IHtmlHelper<TModel> __typeHelper = default(IHtmlHelper<TModel>);
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         ((System.Action)(() => {
+#nullable restore
 #line 1 "TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports.cshtml"
 global::System.Object Helper = null;
 
 #line default
 #line hidden
+#nullable disable
         }
         ))();
         }
diff --git a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.mappings.txt b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.mappings.txt
index dc03ca32da..6f9eb70d0e 100644
--- a/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.mappings.txt
+++ b/src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports_DesignTime.mappings.txt
@@ -1,10 +1,10 @@
 Source Location: (8:0,8 [19] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports.cshtml)
 |IHtmlHelper<TModel>|
-Generated Location: (760:19,0 [19] )
+Generated Location: (779:20,0 [19] )
 |IHtmlHelper<TModel>|
 
 Source Location: (28:0,28 [6] TestFiles/IntegrationTests/CodeGenerationIntegrationTest/_ViewImports.cshtml)
 |Helper|
-Generated Location: (1027:27,22 [6] )
+Generated Location: (1084:30,22 [6] )
 |Helper|
 
diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTest.cs b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTest.cs
index 2a6eca4094..b90accfae8 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTest.cs
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/test/IntegrationTests/BuildIntegrationTest.cs
@@ -657,7 +657,7 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             var indexFilePath = Path.Combine(RazorIntermediateOutputPath, "Views", "Home", "Index.cshtml.g.cs");
 
             Assert.BuildPassed(result, allowWarnings: true);
-            Assert.BuildWarning(result, "CS8618", "Models\\ErrorViewModel.cs(5,18)");
+            Assert.BuildWarning(result, "CS8618");
             Assert.FileContainsLine(result, indexFilePath, "#nullable restore");
             Assert.FileContainsLine(result, indexFilePath, "#nullable disable");
         }
@@ -673,7 +673,7 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             var indexFilePath = Path.Combine(RazorIntermediateOutputPath, "Views", "Home", "Index.cshtml.g.cs");
 
             Assert.BuildPassed(result, allowWarnings: true);
-            Assert.BuildWarning(result, "CS8618", "Models\\ErrorViewModel.cs(5,18)");
+            Assert.BuildWarning(result, "CS8618");
             Assert.FileContainsLine(result, indexFilePath, "#nullable restore");
             Assert.FileContainsLine(result, indexFilePath, "#nullable disable");
         }