Automatically fix the casing of identifiers where possible

Closes #258

Author: mrmonday

ICSharpCode.CodeConverter/CSharp/CommonConversions.cs

@@ -274,7 +274,7 @@ private string ConvertNumericLiteralValueText(string textForUser, object value)
             return value.ToString();
         }
 
-        public SyntaxToken ConvertIdentifier(SyntaxToken id, bool isAttribute = false)
+        public SyntaxToken ConvertIdentifier(SyntaxToken id, bool isAttribute = false, bool updateCase = false)
         {
             string text = id.ValueText;
 
@@ -285,6 +285,10 @@ public SyntaxToken ConvertIdentifier(SyntaxToken id, bool isAttribute = false)
             if (id.SyntaxTree == _semanticModel.SyntaxTree) {
                 var symbol = _semanticModel.GetSymbolInfo(id.Parent).Symbol;
                 if (symbol != null && !string.IsNullOrWhiteSpace(symbol.Name)) {
+                    if (updateCase && text.Equals(symbol.Name, StringComparison.OrdinalIgnoreCase)) {
+                        text = symbol.Name;
+                    }
+
                     if (symbol.IsConstructor() && isAttribute) {
                         text = symbol.ContainingType.Name;
                         if (text.EndsWith("Attribute", StringComparison.OrdinalIgnoreCase))

ICSharpCode.CodeConverter/CSharp/NodesVisitor.cs

@@ -1298,9 +1298,9 @@ public override CSharpSyntaxNode VisitQueryExpression(VBSyntax.QueryExpressionSy
                 return _queryConverter.ConvertClauses(node.Clauses);
             }
 
-            private SyntaxToken ConvertIdentifier(SyntaxToken identifierIdentifier, bool isAttribute = false)
+            private SyntaxToken ConvertIdentifier(SyntaxToken identifierIdentifier, bool isAttribute = false, bool updateCase = false)
             {
-                return CommonConversions.ConvertIdentifier(identifierIdentifier, isAttribute);
+                return CommonConversions.ConvertIdentifier(identifierIdentifier, isAttribute, updateCase);
             }
 
             public override CSharpSyntaxNode VisitOrdering(VBSyntax.OrderingSyntax node)
@@ -1630,7 +1630,7 @@ public override CSharpSyntaxNode VisitTypeConstraint(VBSyntax.TypeConstraintSynt
 
             public override CSharpSyntaxNode VisitIdentifierName(VBSyntax.IdentifierNameSyntax node)
             {
-                var identifier = SyntaxFactory.IdentifierName(ConvertIdentifier(node.Identifier, node.GetAncestor<VBSyntax.AttributeSyntax>() != null));
+                var identifier = SyntaxFactory.IdentifierName(ConvertIdentifier(node.Identifier, node.GetAncestor<VBSyntax.AttributeSyntax>() != null, updateCase: true));
 
                 return !node.Parent.IsKind(VBasic.SyntaxKind.SimpleMemberAccessExpression, VBasic.SyntaxKind.QualifiedName, VBasic.SyntaxKind.NameColonEquals, VBasic.SyntaxKind.ImportsStatement, VBasic.SyntaxKind.NamespaceStatement, VBasic.SyntaxKind.NamedFieldInitializer)
                                     || node.Parent is VBSyntax.MemberAccessExpressionSyntax maes && maes.Expression == node

TestData/VBToCSCharacterization/ConvertSolution/WindowsAppVb/My Project/Application.Designer.cs

@@ -1104,6 +1104,33 @@ End Sub
     {
     }
 }");
-        }
-    }
-}
+        }
+
+        [Fact]
+        public void MemberAccessCasing()
+        {
+            TestConversionVisualBasicToCSharpWithoutComments(@"Public Class Class1
+    Sub Bar()
+
+    End Sub
+
+    Sub Foo()
+        bar()
+        me.bar()
+    End Sub
+End Class", @"public class Class1
+{
+    public void Bar()
+    {
+    }
+
+    public void Foo()
+    {
+        Bar();
+        this.Bar();
+    }
+}");
+        }
+
+    }
+}

Tests/CSharp/ExpressionTests.cs

@@ -624,20 +624,22 @@ public void DeclareStatement(string vbMethodDecl,string vbType, string csType)
         {
             // Intentionally uses a type name with a different casing as the loop variable, i.e. "process" to test name resolution
             TestConversionVisualBasicToCSharp($@"Imports System.Diagnostics
+Imports System.Threading
 
 Public Class AcmeClass
     Private Declare {vbMethodDecl} SetForegroundWindow Lib ""user32"" (ByVal hwnd As Int32){vbType}
 
     Public Shared Sub Main()
-        For Each process In Process.GetProcesses().Where(Function(p) Not String.IsNullOrEmpty(p.MainWindowTitle))
-            SetForegroundWindow(process.MainWindowHandle.ToInt32())
+        For Each proc In Process.GetProcesses().Where(Function(p) Not String.IsNullOrEmpty(p.MainWindowTitle))
+            SetForegroundWindow(proc.MainWindowHandle.ToInt32())
             Thread.Sleep(1000)
         Next
     End Sub
 End Class"
                 , $@"using System;
 using System.Diagnostics;
 using System.Linq;
+using System.Threading;
 
 public class AcmeClass
 {{
@@ -646,9 +648,9 @@ public class AcmeClass
 
     public static void Main()
     {{
-        foreach (var process in Process.GetProcesses().Where(p => !string.IsNullOrEmpty(p.MainWindowTitle)))
+        foreach (var proc in Process.GetProcesses().Where(p => !string.IsNullOrEmpty(p.MainWindowTitle)))
         {{
-            SetForegroundWindow(process.MainWindowHandle.ToInt32());
+            SetForegroundWindow(proc.MainWindowHandle.ToInt32());
             Thread.Sleep(1000);
         }}
     }}