Add regression test for #827 in correct location, fix comment indentation

- Add TestOverridableAutoPropertyBackingFieldAccessAsync to
  Tests/CSharp/MemberTests/PropertyMemberTests.cs (VB->CS tests) covering
  the exact issue #827 scenario: _Prop = 10 converts to MyClassProp = 10
- Remove duplicate test from Tests/VB/MemberTests.cs where VB->CS tests
  do not belong
- Fix indentation of comment in CommonConversions.cs

https://claude.ai/code/session_01AkwUvu3XuCdj3D4axoX4UX

Author: claude

CodeConverter/CSharp/CommonConversions.cs

@@ -1,4 +1,4 @@
-using System.Collections.Immutable;
+using System.Collections.Immutable;
 using System.Linq.Expressions;
 using System.Runtime.CompilerServices;
 using ICSharpCode.CodeConverter.Util.FromRoslyn;
@@ -293,7 +293,7 @@ public SyntaxToken ConvertIdentifier(SyntaxToken id, bool isAttribute = false, S
                     // AND the first explicitly declared parameter is this symbol, we need to replace it with value.
                     text = "value";
                 } else if (normalizedText.StartsWith("_", StringComparison.OrdinalIgnoreCase) && idSymbol is IFieldSymbol propertyFieldSymbol && propertyFieldSymbol.AssociatedSymbol?.IsKind(SymbolKind.Property) == true) {
-// For virtual auto-properties, VB backing field _Prop maps to the C# MyClassProp backing property
+                    // For virtual auto-properties, VB backing field _Prop maps to the C# MyClassProp backing property (bypasses virtual dispatch)
                     text = propertyFieldSymbol.IsImplicitlyDeclared && propertyFieldSymbol.AssociatedSymbol is IPropertySymbol { IsVirtual: true, IsAbstract: false } vProp
                         ? "MyClass" + vProp.Name
                         : propertyFieldSymbol.AssociatedSymbol.Name;

Tests/CSharp/MemberTests/PropertyMemberTests.cs

@@ -1,4 +1,4 @@
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using ICSharpCode.CodeConverter.Tests.TestRunners;
 using Xunit;
 
@@ -874,4 +874,49 @@ public static IEnumerable<object[]> SomeObjects
     }
 }");
     }
-}
+    /// <summary>Issue #827: VB auto-property backing field access (_Prop) should map to MyClassProp for overridable properties</summary>
+    [Fact]
+    public async Task TestOverridableAutoPropertyBackingFieldAccessAsync()
+    {
+        await TestConversionVisualBasicToCSharpAsync(@"Class Foo
+    Overridable Property Prop As Integer = 5
+
+    Sub Test()
+        _Prop = 10
+        Dim isCorrect = MyClass.Prop = 10
+    End Sub
+End Class
+Class Child
+    Inherits Foo
+    Overrides Property Prop As Integer = 20
+End Class", @"
+internal partial class Foo
+{
+    public int MyClassProp { get; set; } = 5;
+
+    public virtual int Prop
+    {
+        get
+        {
+            return MyClassProp;
+        }
+
+        set
+        {
+            MyClassProp = value;
+        }
+    }
+
+    public void Test()
+    {
+        MyClassProp = 10;
+        bool isCorrect = MyClassProp == 10;
+    }
+}
+
+internal partial class Child : Foo
+{
+    public override int Prop { get; set; } = 20;
+}");
+    }
+}

Tests/VB/MemberTests.cs

@@ -1,4 +1,4 @@
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using ICSharpCode.CodeConverter.Tests.TestRunners;
 using ICSharpCode.CodeConverter.VB;
 using Xunit;
@@ -1495,49 +1495,4 @@ End Sub
 End Class");
     }
 
-
-    [Fact]
-    public async Task TestMyClassPropertyAccess()
-    {
-        await TestConversionVisualBasicToCSharpAsync(@"
-Class Foo
-    Overridable Property Prop As Integer = 5
-
-    Sub Test()
-        _Prop = 10 ' This should convert to MyClassProp = 10 not to Prop = 10
-        Dim isCorrect = MyClass.Prop = 10 ' After conversion this will return 5instead of 10 because we wrote to Child.Prop
-    End Sub
-End Class
-Class Child
-    Inherits Foo
-    Overrides Property Prop As Integer = 20
-End Class", @"
-internal partial class Foo
-{
-    public int MyClassProp { get; set; } = 5;
-
-    public virtual int Prop
-    {
-        get
-        {
-            return MyClassProp;
-        }
-
-        set
-        {
-            MyClassProp = value;
-        }
-    }
-
-    public void Test()
-    {
-        MyClassProp = 10; // This should convert to MyClassProp = 10 not to Prop = 10
-        bool isCorrect = MyClassProp == 10; // After conversion this will return 5instead of 10 because we wrote to Child.Prop
-    }
-}
-internal partial class Child : Foo
-{
-    public override int Prop { get; set; } = 20;
-}");
-    }
 }