Add some new IR nodes

This adds the basics of a few new node types. I'll do a follow up to start
using these so we can eliminate some misuse of the statement node.

src/Microsoft.AspNetCore.Mvc.Razor.Extensions/InjectDirective.cs

@@ -70,14 +70,14 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
 
             public IList<DirectiveIRNode> Directives { get; } = new List<DirectiveIRNode>();
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (Class == null)
                 {
                     Class = node;
                 }
 
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
 
             public override void VisitDirective(DirectiveIRNode node)

src/Microsoft.AspNetCore.Mvc.Razor.Extensions/ModelDirective.cs

@@ -113,24 +113,24 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
 
             public IList<DirectiveIRNode> ModelDirectives { get; } = new List<DirectiveIRNode>();
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 if (Namespace == null)
                 {
                     Namespace = node;
                 }
 
-                base.VisitNamespace(node);
+                base.VisitNamespaceDeclaration(node);
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (Class == null)
                 {
                     Class = node;
                 }
 
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
 
             public override void VisitDirective(DirectiveIRNode node)

src/Microsoft.AspNetCore.Mvc.Razor.Extensions/NamespaceDirective.cs

@@ -164,24 +164,24 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
             // We want the last one, so get them all and then .
             public DirectiveIRNode LastNamespaceDirective { get; private set; }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 if (FirstNamespace == null)
                 {
                     FirstNamespace = node;
                 }
 
-                base.VisitNamespace(node);
+                base.VisitNamespaceDeclaration(node);
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (FirstClass == null)
                 {
                     FirstClass = node;
                 }
 
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
 
             public override void VisitDirective(DirectiveIRNode node)

src/Microsoft.AspNetCore.Mvc.Razor.Extensions/PagesPropertyInjectionPass.cs

@@ -51,14 +51,14 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
         {
             public ClassDeclarationIRNode Class { get; private set; }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (Class == null)
                 {
                     Class = node;
                 }
 
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
         }
     }

src/Microsoft.AspNetCore.Mvc.Razor.Extensions/ViewComponentTagHelperPass.cs

@@ -249,24 +249,24 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
                 }
             }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 if (Namespace == null)
                 {
                     Namespace = node;
                 }
 
-                base.VisitNamespace(node);
+                base.VisitNamespaceDeclaration(node);
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (Class == null)
                 {
                     Class = node;
                 }
 
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
 
             public override void VisitDeclareTagHelperFields(DeclareTagHelperFieldsIRNode node)

src/Microsoft.AspNetCore.Razor.Language/CodeGeneration/DefaultDocumentWriter.cs

@@ -82,7 +82,7 @@ namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration
                 Context.BasicWriter.WriteUsingStatement(Context, node);
             }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 Context.Writer
                     .Write("namespace ")
@@ -95,7 +95,7 @@ namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration
                 }
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Context.Writer
                     .Write(node.AccessModifier)
@@ -138,7 +138,7 @@ namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration
                 }
             }
 
-            public override void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+            public override void VisitMethodDeclaration(MethodDeclarationIRNode node)
             {
                 Context.Writer.WriteLine("#pragma warning disable 1998");
 
@@ -174,6 +174,16 @@ namespace Microsoft.AspNetCore.Razor.Language.CodeGeneration
                 Context.Writer.WriteLine("#pragma warning restore 1998");
             }
 
+            public override void VisitFieldDeclaration(FieldDeclarationIRNode node)
+            {
+                Context.Writer.WriteField(node.AccessModifier, node.Modifiers, node.Type, node.Name);
+            }
+
+            public override void VisitPropertyDeclaration(PropertyDeclarationIRNode node)
+            {
+                Context.Writer.WriteAutoPropertyDeclaration(node.AccessModifier, node.Modifiers, node.Type, node.Name);
+            }
+
             public override void VisitExtension(ExtensionIRNode node)
             {
                 node.WriteNode(_target, Context);

src/Microsoft.AspNetCore.Razor.Language/DefaultDirectiveIRPass.cs

@@ -87,7 +87,7 @@ namespace Microsoft.AspNetCore.Razor.Language
 
             public IList<DirectiveIRNode> SectionDirectiveNodes { get; } = new List<DirectiveIRNode>();
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 if (ClassNode == null)
                 {

src/Microsoft.AspNetCore.Razor.Language/DocumentClassifierPassBase.cs

@@ -141,6 +141,12 @@ namespace Microsoft.AspNetCore.Razor.Language
 
             public override void VisitDefault(RazorIRNode node)
             {
+                if (node is MemberDeclarationIRNode)
+                {
+                    _class.Add(node);
+                    return;
+                }
+
                 _method.Add(node);
             }
         }

src/Microsoft.AspNetCore.Razor.Language/Intermediate/ClassDeclarationIRNode.cs

@@ -6,7 +6,7 @@ using System.Collections.Generic;
 
 namespace Microsoft.AspNetCore.Razor.Language.Intermediate
 {
-    public class ClassDeclarationIRNode : RazorIRNode
+    public sealed class ClassDeclarationIRNode : MemberDeclarationIRNode
     {
         private ItemCollection _annotations;
 
@@ -22,6 +22,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
                 return _annotations;
             }
         }
+
         public override IList<RazorIRNode> Children { get; } = new List<RazorIRNode>();
 
         public override RazorIRNode Parent { get; set; }
@@ -43,7 +44,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
                 throw new ArgumentNullException(nameof(visitor));
             }
 
-            visitor.VisitClass(this);
+            visitor.VisitClassDeclaration(this);
         }
     }
 }

src/Microsoft.AspNetCore.Razor.Language/Intermediate/FieldDeclarationIRNode.cs

@@ -0,0 +1,50 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Language.Intermediate
+{
+    public sealed class FieldDeclarationIRNode : MemberDeclarationIRNode
+    {
+        private ItemCollection _annotations;
+
+        public override ItemCollection Annotations
+        {
+            get
+            {
+                if (_annotations == null)
+                {
+                    _annotations = new DefaultItemCollection();
+                }
+
+                return _annotations;
+            }
+        }
+
+        public override IList<RazorIRNode> Children { get; } = EmptyArray;
+
+        public IList<string> Modifiers { get; set; } = new List<string>();
+
+        public override RazorIRNode Parent { get; set; }
+
+        public override SourceSpan? Source { get; set; }
+
+        public string AccessModifier { get; set; }
+
+        public string Name { get; set; }
+
+        public string Type { get; set; }
+        
+        public override void Accept(RazorIRNodeVisitor visitor)
+        {
+            if (visitor == null)
+            {
+                throw new ArgumentNullException(nameof(visitor));
+            }
+
+            visitor.VisitFieldDeclaration(this);
+        }
+    }
+}

src/Microsoft.AspNetCore.Razor.Language/Intermediate/MemberDeclarationIRNode.cs

@@ -0,0 +1,9 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Razor.Language.Intermediate
+{
+    public abstract class MemberDeclarationIRNode : RazorIRNode
+    {
+    }
+}

src/Microsoft.AspNetCore.Razor.Language/Intermediate/MethodDeclarationIRNode.cs

@@ -6,7 +6,7 @@ using System.Collections.Generic;
 
 namespace Microsoft.AspNetCore.Razor.Language.Intermediate
 {
-    public class MethodDeclarationIRNode : RazorIRNode
+    public sealed class MethodDeclarationIRNode : MemberDeclarationIRNode
     {
         private ItemCollection _annotations;
 
@@ -31,7 +31,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
 
         public string AccessModifier { get; set; }
 
-        public IList<string> Modifiers { get; set; }
+        public IList<string> Modifiers { get; set; } = new List<string>();
 
         public string Name { get; set; }
 
@@ -44,7 +44,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
                 throw new ArgumentNullException(nameof(visitor));
             }
 
-            visitor.VisitRazorMethodDeclaration(this);
+            visitor.VisitMethodDeclaration(this);
         }
     }
 }

src/Microsoft.AspNetCore.Razor.Language/Intermediate/NamespaceDeclarationIRNode.cs

@@ -38,7 +38,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
                 throw new ArgumentNullException(nameof(visitor));
             }
 
-            visitor.VisitNamespace(this);
+            visitor.VisitNamespaceDeclaration(this);
         }
     }
 }

src/Microsoft.AspNetCore.Razor.Language/Intermediate/PropertyDeclarationIRNode.cs

@@ -0,0 +1,50 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+
+namespace Microsoft.AspNetCore.Razor.Language.Intermediate
+{
+    public sealed class PropertyDeclarationIRNode : MemberDeclarationIRNode
+    {
+        private ItemCollection _annotations;
+
+        public override ItemCollection Annotations
+        {
+            get
+            {
+                if (_annotations == null)
+                {
+                    _annotations = new DefaultItemCollection();
+                }
+
+                return _annotations;
+            }
+        }
+
+        public override IList<RazorIRNode> Children { get; } = EmptyArray;
+
+        public IList<string> Modifiers { get; set; } = new List<string>();
+
+        public override RazorIRNode Parent { get; set; }
+
+        public override SourceSpan? Source { get; set; }
+
+        public string AccessModifier { get; set; }
+
+        public string Name { get; set; }
+
+        public string Type { get; set; }
+
+        public override void Accept(RazorIRNodeVisitor visitor)
+        {
+            if (visitor == null)
+            {
+                throw new ArgumentNullException(nameof(visitor));
+            }
+
+            visitor.VisitPropertyDeclaration(this);
+        }
+    }
+}

src/Microsoft.AspNetCore.Razor.Language/Intermediate/RazorIRNodeVisitor.cs

@@ -64,12 +64,22 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
             VisitDefault(node);
         }
 
-        public virtual void VisitClass(ClassDeclarationIRNode node)
+        public virtual void VisitClassDeclaration(ClassDeclarationIRNode node)
         {
             VisitDefault(node);
         }
 
-        public virtual void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+        public virtual void VisitMethodDeclaration(MethodDeclarationIRNode node)
+        {
+            VisitDefault(node);
+        }
+
+        public virtual void VisitFieldDeclaration(FieldDeclarationIRNode node)
+        {
+            VisitDefault(node);
+        }
+
+        public virtual void VisitPropertyDeclaration(PropertyDeclarationIRNode node)
         {
             VisitDefault(node);
         }
@@ -84,7 +94,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Intermediate
             VisitDefault(node);
         }
 
-        public virtual void VisitNamespace(NamespaceDeclarationIRNode node)
+        public virtual void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
         {
             VisitDefault(node);
         }

src/Microsoft.AspNetCore.Razor.Language/Legacy/CSharpCodeWriter.cs

@@ -358,6 +358,66 @@ namespace Microsoft.AspNetCore.Razor.Language.Legacy
                 string.Format(CultureInfo.InvariantCulture, InstanceMethodFormat, instanceName, methodName));
         }
 
+        public CSharpCodeWriter WriteField(string accessibility, string typeName, string fieldName)
+        {
+            if (accessibility == null)
+            {
+                throw new ArgumentNullException(nameof(accessibility));
+            }
+
+            if (typeName == null)
+            {
+                throw new ArgumentNullException(nameof(typeName));
+            }
+
+            if (fieldName == null)
+            {
+                throw new ArgumentNullException(nameof(fieldName));
+            }
+
+            return WriteField(accessibility, Array.Empty<string>(), typeName, fieldName);
+        }
+
+        public CSharpCodeWriter WriteField(string accessibility, IList<string> modifiers, string typeName, string fieldName)
+        {
+            if (accessibility == null)
+            {
+                throw new ArgumentNullException(nameof(accessibility));
+            }
+
+            if (modifiers == null)
+            {
+                throw new ArgumentNullException(nameof(modifiers));
+            }
+
+            if (typeName == null)
+            {
+                throw new ArgumentNullException(nameof(typeName));
+            }
+
+            if (fieldName == null)
+            {
+                throw new ArgumentNullException(nameof(fieldName));
+            }
+
+            Write(accessibility);
+            Write(" ");
+
+            for (var i = 0; i < modifiers.Count; i++)
+            {
+                Write(modifiers[i]);
+                Write(" ");
+            }
+
+            Write(typeName);
+            Write(" ");
+            Write(fieldName);
+            Write(";");
+            WriteLine();
+
+            return this;
+        }
+
         public CSharpCodeWriter WriteMethodInvocation(string methodName, params string[] parameters)
         {
             return WriteMethodInvocation(methodName, endLine: true, parameters: parameters);
@@ -370,15 +430,64 @@ namespace Microsoft.AspNetCore.Razor.Language.Legacy
                 .WriteEndMethodInvocation(endLine);
         }
 
-        public CSharpCodeWriter WriteAutoPropertyDeclaration(string accessibility, string typeName, string name)
+        public CSharpCodeWriter WriteAutoPropertyDeclaration(string accessibility, string typeName, string propertyName)
         {
-            return Write(accessibility)
+            if (accessibility == null)
-                .Write(" ")
+            {
-                .Write(typeName)
+                throw new ArgumentNullException(nameof(accessibility));
-                .Write(" ")
+            }
-                .Write(name)
+
-                .Write(" { get; set; }")
+            if (typeName == null)
-                .WriteLine();
+            {
+                throw new ArgumentNullException(nameof(typeName));
+            }
+
+            if (propertyName == null)
+            {
+                throw new ArgumentNullException(nameof(propertyName));
+            }
+
+            return WriteAutoPropertyDeclaration(accessibility, Array.Empty<string>(), typeName, propertyName);
+        }
+
+        public CSharpCodeWriter WriteAutoPropertyDeclaration(string accessibility, IList<string> modifiers, string typeName, string propertyName)
+        {
+            if (accessibility == null)
+            {
+                throw new ArgumentNullException(nameof(accessibility));
+            }
+
+            if (modifiers == null)
+            {
+                throw new ArgumentNullException(nameof(modifiers));
+            }
+
+            if (typeName == null)
+            {
+                throw new ArgumentNullException(nameof(typeName));
+            }
+
+            if (propertyName == null)
+            {
+                throw new ArgumentNullException(nameof(propertyName));
+            }
+
+            Write(accessibility);
+            Write(" ");
+
+            for (var i = 0; i < modifiers.Count; i++)
+            {
+                Write(modifiers[i]);
+                Write(" ");
+            }
+
+            Write(typeName);
+            Write(" ");
+            Write(propertyName);
+            Write(" { get; set; }");
+            WriteLine();
+
+            return this;
         }
 
         public CSharpDisableWarningScope BuildDisableWarningScope(int warning)

src/Microsoft.AspNetCore.Razor.Language/RazorDesignTimeIRPass.cs

@@ -22,7 +22,7 @@ namespace Microsoft.AspNetCore.Razor.Language
         {
             private DesignTimeDirectiveIRNode _designTimeDirectiveIRNode;
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 var designTimeHelperDeclaration = new CSharpStatementIRNode();
                 RazorIRBuilder.Create(designTimeHelperDeclaration)

src/Microsoft.AspNetCore.Razor.Language/RazorPreallocatedTagHelperAttributeOptimizationPass.cs

@@ -26,7 +26,7 @@ namespace Microsoft.AspNetCore.Razor.Language
             private int _variableCountOffset;
             private int _preallocatedDeclarationCount = 0;
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 _classDeclaration = node;
                 _variableCountOffset = node.Children.Count;

test/Microsoft.AspNetCore.Mvc.Razor.Extensions.Test/InjectDirectiveTest.cs

@@ -216,7 +216,7 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
         {
             public ClassDeclarationIRNode Node { get; set; }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Node = node;
             }

test/Microsoft.AspNetCore.Mvc.Razor.Extensions.Test/ModelDirectiveTest.cs

@@ -277,7 +277,7 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
         {
             public ClassDeclarationIRNode Node { get; set; }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Node = node;
             }
@@ -287,7 +287,7 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
         {
             public NamespaceDeclarationIRNode Node { get; set; }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 Node = node;
             }

test/Microsoft.AspNetCore.Mvc.Razor.Extensions.Test/MvcViewDocumentClassifierPassTest.cs

@@ -223,21 +223,21 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
 
             public MethodDeclarationIRNode Method { get; private set; }
 
-            public override void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+            public override void VisitMethodDeclaration(MethodDeclarationIRNode node)
             {
                 Method = node;
             }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 Namespace = node;
-                base.VisitNamespace(node);
+                base.VisitNamespaceDeclaration(node);
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Class = node;
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
         }
     }

test/Microsoft.AspNetCore.Mvc.Razor.Extensions.Test/RazorPageDocumentClassifierPassTest.cs

@@ -249,21 +249,21 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions
 
             public MethodDeclarationIRNode Method { get; private set; }
 
-            public override void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+            public override void VisitMethodDeclaration(MethodDeclarationIRNode node)
             {
                 Method = node;
             }
 
-            public override void VisitNamespace(NamespaceDeclarationIRNode node)
+            public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
             {
                 Namespace = node;
-                base.VisitNamespace(node);
+                base.VisitNamespaceDeclaration(node);
             }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Class = node;
-                base.VisitClass(node);
+                base.VisitClassDeclaration(node);
             }
         }
     }

test/Microsoft.AspNetCore.Mvc.Razor.Extensions.Test/ViewComponentTagHelperPassTest.cs

@@ -348,7 +348,7 @@ public class __Generated__TagCloudViewComponentTagHelper : Microsoft.AspNetCore.
         {
             public ClassDeclarationIRNode Node { get; set; }
 
-            public override void VisitClass(ClassDeclarationIRNode node)
+            public override void VisitClassDeclaration(ClassDeclarationIRNode node)
             {
                 Node = node;
             }

test/Microsoft.AspNetCore.Razor.Language.Test/CodeGeneration/DefaultDocumentWriterTest.cs

@@ -125,6 +125,82 @@ internal virtual async string TestMethod()
 {
 }
 #pragma warning restore 1998
+",
+                csharp,
+                ignoreLineEndingDifferences: true);
+        }
+
+        [Fact]
+        public void WriteDocument_WritesField()
+        {
+            // Arrange
+            var codeDocument = TestRazorCodeDocument.CreateEmpty();
+            var options = RazorParserOptions.CreateDefaultOptions();
+
+            var target = RuntimeTarget.CreateDefault(codeDocument, options);
+            var context = new CSharpRenderingContext()
+            {
+                Options = options,
+                Writer = new Legacy.CSharpCodeWriter(),
+            };
+            var writer = new DefaultDocumentWriter(target, context);
+
+            var builder = RazorIRBuilder.Document();
+            builder.Add(new FieldDeclarationIRNode()
+            {
+                AccessModifier = "internal",
+                Modifiers = new List<string> { "readonly",},
+                Name = "_foo",
+                Type = "string",
+            });
+
+            var document = (DocumentIRNode)builder.Build();
+
+            // Act
+            writer.WriteDocument(document);
+
+            // Assert
+            var csharp = context.Writer.Builder.ToString();
+            Assert.Equal(
+@"internal readonly string _foo;
+",
+                csharp,
+                ignoreLineEndingDifferences: true);
+        }
+
+        [Fact]
+        public void WriteDocument_WritesProperty()
+        {
+            // Arrange
+            var codeDocument = TestRazorCodeDocument.CreateEmpty();
+            var options = RazorParserOptions.CreateDefaultOptions();
+
+            var target = RuntimeTarget.CreateDefault(codeDocument, options);
+            var context = new CSharpRenderingContext()
+            {
+                Options = options,
+                Writer = new Legacy.CSharpCodeWriter(),
+            };
+            var writer = new DefaultDocumentWriter(target, context);
+
+            var builder = RazorIRBuilder.Document();
+            builder.Add(new PropertyDeclarationIRNode()
+            {
+                AccessModifier = "internal",
+                Modifiers = new List<string> { "virtual", },
+                Name = "Foo",
+                Type = "string",
+            });
+
+            var document = (DocumentIRNode)builder.Build();
+
+            // Act
+            writer.WriteDocument(document);
+
+            // Assert
+            var csharp = context.Writer.Builder.ToString();
+            Assert.Equal(
+@"internal virtual string Foo { get; set; }
 ",
                 csharp,
                 ignoreLineEndingDifferences: true);

test/Microsoft.AspNetCore.Razor.Language.Test/Legacy/CSharpCodeWriterTest.cs

@@ -1,6 +1,7 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
+using System;
 using Xunit;
 
 namespace Microsoft.AspNetCore.Razor.Language.Legacy
@@ -45,5 +46,61 @@ namespace Microsoft.AspNetCore.Razor.Language.Legacy
             // Assert
             Assert.Equal(expected, code);
         }
+
+        [Fact]
+        public void WriteField_WritesFieldDeclaration()
+        {
+            // Arrange
+            var writer = new CSharpCodeWriter();
+
+            // Act
+            writer.WriteField("private", "global::System.String", "_myString");
+
+            // Assert
+            var output = writer.GenerateCode();
+            Assert.Equal("private global::System.String _myString;" + Environment.NewLine, output);
+        }
+
+        [Fact]
+        public void WriteField_WithModifiers_WritesFieldDeclaration()
+        {
+            // Arrange
+            var writer = new CSharpCodeWriter();
+
+            // Act
+            writer.WriteField("private", new[] { "readonly", "static" }, "global::System.String", "_myString");
+
+            // Assert
+            var output = writer.GenerateCode();
+            Assert.Equal("private readonly static global::System.String _myString;" + Environment.NewLine, output);
+        }
+
+        [Fact]
+        public void WriteAutoPropertyDeclaration_WritesPropertyDeclaration()
+        {
+            // Arrange
+            var writer = new CSharpCodeWriter();
+
+            // Act
+            writer.WriteAutoPropertyDeclaration("public", "global::System.String", "MyString");
+
+            // Assert
+            var output = writer.GenerateCode();
+            Assert.Equal("public global::System.String MyString { get; set; }" + Environment.NewLine, output);
+        }
+
+        [Fact]
+        public void WriteAutoPropertyDeclaration_WithModifiers_WritesPropertyDeclaration()
+        {
+            // Arrange
+            var writer = new CSharpCodeWriter();
+
+            // Act
+            writer.WriteAutoPropertyDeclaration("public", new[] { "static" }, "global::System.String", "MyString");
+
+            // Assert
+            var output = writer.GenerateCode();
+            Assert.Equal("public static global::System.String MyString { get; set; }" + Environment.NewLine, output);
+        }
     }
 }

test/Microsoft.AspNetCore.Razor.Test.Common/Langauge/IntegrationTests/IntegrationTestBase.cs

@@ -221,7 +221,7 @@ namespace Microsoft.AspNetCore.Razor.Language.IntegrationTests
 
             private class ApiSetsIRWalker : RazorIRNodeWalker
             {
-                public override void VisitClass(ClassDeclarationIRNode node)
+                public override void VisitClassDeclaration(ClassDeclarationIRNode node)
                 {
                     node.Name = Filename.Replace('/', '_');
                     node.AccessModifier = "public";
@@ -229,14 +229,14 @@ namespace Microsoft.AspNetCore.Razor.Language.IntegrationTests
                     VisitDefault(node);
                 }
 
-                public override void VisitNamespace(NamespaceDeclarationIRNode node)
+                public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
                 {
                     node.Content = "Microsoft.AspNetCore.Razor.Language.IntegrationTests.TestFiles";
 
                     VisitDefault(node);
                 }
 
-                public override void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+                public override void VisitMethodDeclaration(MethodDeclarationIRNode node)
                 {
                     node.AccessModifier = "public";
                     node.Modifiers = new[] { "async" };

test/Microsoft.AspNetCore.Razor.Test.Common/Langauge/IntegrationTests/RazorIRNodeWriter.cs

@@ -26,7 +26,7 @@ namespace Microsoft.AspNetCore.Razor.Language.IntegrationTests
             WriteBasicNode(node);
         }
 
-        public override void VisitClass(ClassDeclarationIRNode node)
+        public override void VisitClassDeclaration(ClassDeclarationIRNode node)
         {
             WriteContentNode(node, node.AccessModifier, node.Name, node.BaseType, string.Join(", ", node.Interfaces ?? new List<string>()));
         }
@@ -61,12 +61,12 @@ namespace Microsoft.AspNetCore.Razor.Language.IntegrationTests
             WriteContentNode(node, node.Prefix, node.Content);
         }
 
-        public override void VisitNamespace(NamespaceDeclarationIRNode node)
+        public override void VisitNamespaceDeclaration(NamespaceDeclarationIRNode node)
         {
             WriteContentNode(node, node.Content);
         }
 
-        public override void VisitRazorMethodDeclaration(MethodDeclarationIRNode node)
+        public override void VisitMethodDeclaration(MethodDeclarationIRNode node)
         {
             WriteContentNode(node, node.AccessModifier, string.Join(", ", node.Modifiers ?? new List<string>()), node.ReturnType, node.Name);
         }