Feature/convert name of

src/Analyzers/CSharp/Analyzers/CSharpAnalyzers.projitems

@@ -18,6 +18,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)AddAccessibilityModifiers\CSharpAddAccessibilityModifiersDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AddBraces\CSharpAddBracesDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AddRequiredParentheses\CSharpAddRequiredPatternParenthesesDiagnosticAnalyzer.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ConvertTypeOfToNameOf\CSharpConvertTypeOfToNameOfDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessarySuppressions\CSharpRemoveUnnecessaryPragmaSuppressionsDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessarySuppressions\CSharpRemoveUnnecessaryAttributeSuppressionsDiagnosticAnalyzer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RemoveUnnecessaryParentheses\CSharpRemoveUnnecessaryPatternParenthesesDiagnosticAnalyzer.cs" />

src/Analyzers/CSharp/Analyzers/CSharpAnalyzersResources.resx

@@ -289,4 +289,7 @@
   <data name="Suppression_operator_has_no_effect_and_can_be_misinterpreted" xml:space="preserve">
     <value>Suppression operator has no effect and can be misinterpreted</value>
   </data>
-</root>
+  <data name="Convert_typeof_to_nameof" xml:space="preserve">
+    <value>Convert 'typeof' to 'nameof'</value>
+  </data>
+</root>

src/Analyzers/CSharp/Analyzers/ConvertTypeofToNameof/CSharpConvertTypeofToNameofDiagnosticAnalyzer.cs

@@ -0,0 +1,43 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#nullable enable
+
+using Microsoft.CodeAnalysis.CodeStyle;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+using Microsoft.CodeAnalysis.ConvertTypeOfToNameOf;
+using Microsoft.CodeAnalysis.LanguageServices;
+using Microsoft.CodeAnalysis.Operations;
+using Microsoft.CodeAnalysis.Shared.Extensions;
+
+namespace Microsoft.CodeAnalysis.CSharp.ConvertTypeOfToNameOf
+{
+    /// <summary>
+    /// Finds code like typeof(someType).Name and determines whether it can be changed to nameof(someType), if yes then it offers a diagnostic
+    /// </summary>
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
+    internal sealed class CSharpConvertTypeOfToNameOfDiagnosticAnalyzer : AbstractConvertTypeOfToNameOfDiagnosticAnalyzer
+    {
+        public CSharpConvertTypeOfToNameOfDiagnosticAnalyzer()
+        {
+        }
+
+        protected override bool IsValidTypeofAction(OperationAnalysisContext context)
+        {
+            var node = context.Operation.Syntax;
+            var syntaxTree = node.SyntaxTree;
+            // nameof was added in CSharp 6.0, so don't offer it for any languages before that time
+            if (((CSharpParseOptions)syntaxTree.Options).LanguageVersion < LanguageVersion.CSharp6)
+            {
+                return false;
+            }
+
+            // Make sure that the syntax that we're looking at is actually a typeof expression and that
+            // the parent syntax is a member access expression otherwise the syntax is not the kind of
+            // expression that we want to analyze
+            return node is TypeOfExpressionSyntax { Parent: MemberAccessExpressionSyntax _ };
+        }
+    }
+}

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.cs.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Převést příkaz switch na výraz</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Dekonstruovat deklaraci proměnné</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.de.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Switch-Anweisung in Ausdruck konvertieren</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Variablendeklaration dekonstruieren</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.es.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Convertir una instrucción switch en expresión</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Desconstruir la declaración de variable</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.fr.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Convertir l'instruction switch en expression</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Déconstruire la déclaration de variable</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.it.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Converti l'istruzione switch in espressione</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Decostruisci la dichiarazione di variabile</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.ja.xlf

@@ -17,6 +17,11 @@
         <target state="translated">switch ステートメントを式に変換します</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">変数の宣言を分解</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.ko.xlf

@@ -17,6 +17,11 @@
         <target state="translated">switch 문을 식으로 변환</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">변수 선언 분해</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.pl.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Konwertuj instrukcję switch na wyrażenie</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Zdekonstruuj deklarację zmiennej</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.pt-BR.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Converter a instrução switch em expressão</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Desconstruir declaração de variável</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.ru.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Преобразовать оператор switch в выражение</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Деконструировать объявление переменной</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.tr.xlf

@@ -17,6 +17,11 @@
         <target state="translated">Switch deyimini ifadeye dönüştür</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">Değişken bildirimini ayrıştır</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.zh-Hans.xlf

@@ -17,6 +17,11 @@
         <target state="translated">将 switch 语句转换为表达式</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">析构变量声明</target>

src/Analyzers/CSharp/Analyzers/xlf/CSharpAnalyzersResources.zh-Hant.xlf

@@ -17,6 +17,11 @@
         <target state="translated">將 switch 陳述式轉換為運算式</target>
         <note />
       </trans-unit>
+      <trans-unit id="Convert_typeof_to_nameof">
+        <source>Convert 'typeof' to 'nameof'</source>
+        <target state="new">Convert 'typeof' to 'nameof'</target>
+        <note />
+      </trans-unit>
       <trans-unit id="Deconstruct_variable_declaration">
         <source>Deconstruct variable declaration</source>
         <target state="translated">解構變數宣告</target>

src/Analyzers/CSharp/CodeFixes/CSharpCodeFixes.projitems

@@ -16,6 +16,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)AddAccessibilityModifiers\CSharpAddAccessibilityModifiersCodeFixProvider.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AddBraces\CSharpAddBracesCodeFixProvider.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ConvertAnonymousTypeToTuple\CSharpConvertAnonymousTypeToTupleCodeFixProvider.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ConvertTypeOfToNameOf\CSharpConvertTypeOfToNameOfCodeFixProvider.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ConvertSwitchStatementToExpression\ConvertSwitchStatementToExpressionCodeFixProvider.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ConvertSwitchStatementToExpression\ConvertSwitchStatementToExpressionCodeFixProvider.Rewriter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)FileHeaders\CSharpFileHeaderCodeFixProvider.cs" />

src/Analyzers/CSharp/CodeFixes/ConvertTypeOfToNameOf/CSharpConvertTypeOfToNameOfCodeFixProvider.cs

@@ -0,0 +1,40 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#nullable enable
+
+using System.Composition;
+using System.Diagnostics.CodeAnalysis;
+using Microsoft.CodeAnalysis.CodeFixes;
+using Microsoft.CodeAnalysis.ConvertTypeOfToNameOf;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Shared.Extensions;
+
+namespace Microsoft.CodeAnalysis.CSharp.ConvertTypeOfToNameOf
+{
+    [ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(CSharpConvertTypeOfToNameOfCodeFixProvider)), Shared]
+    internal class CSharpConvertTypeOfToNameOfCodeFixProvider : AbstractConvertTypeOfToNameOfCodeFixProvider
+    {
+        [ImportingConstructor]
+        [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
+        public CSharpConvertTypeOfToNameOfCodeFixProvider()
+        {
+        }
+
+        protected override ITypeSymbol? GetSymbolType(SyntaxNode node, SemanticModel model)
+        {
+            if (node is MemberAccessExpressionSyntax memberAccess)
+            {
+                var expression = memberAccess.Expression;
+                if (expression is TypeOfExpressionSyntax typeOfExpresison)
+                {
+                    return model.GetSymbolInfo(typeOfExpresison.Type).Symbol.GetSymbolType();
+                }
+
+                return null;
+            }
+            return null;
+        }
+    }
+}

src/Analyzers/CSharp/Tests/CSharpAnalyzers.UnitTests.projitems

@@ -15,6 +15,8 @@
     <Compile Include="$(MSBuildThisFileDirectory)AddRequiredParentheses\AddRequiredPatternParenthesesTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)AddRequiredParentheses\AddRequiredExpressionParenthesesTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ConvertAnonymousTypeToTuple\ConvertAnonymousTypeToTupleTests.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ConvertTypeOfToNameOf\ConvertTypeOfToNameOfFixAllTests.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ConvertTypeOfToNameOf\ConvertTypeOfToNameOfTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)InlineDeclaration\CSharpInlineDeclarationTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)InlineDeclaration\CSharpInlineDeclarationTests_FixAllTests.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)InvokeDelegateWithConditionalAccess\InvokeDelegateWithConditionalAccessTests.cs" />
@@ -97,4 +99,7 @@
   <ItemGroup Condition="'$(DefaultLanguageSourceExtension)' != '' AND '$(BuildingInsideVisualStudio)' != 'true'">
     <ExpectedCompile Include="$(MSBuildThisFileDirectory)**\*$(DefaultLanguageSourceExtension)" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="$(MSBuildThisFileDirectory)ConvertTypeOfToNameOf\" />
+  </ItemGroup>
 </Project>