Improved symbol name validation on renaming.

src/Main/Base/Project/Src/Editor/Commands/FindReferencesCommand.cs

@@ -4,6 +4,7 @@
 using System;
 using ICSharpCode.Core;
 using ICSharpCode.NRefactory.Semantics;
+using ICSharpCode.SharpDevelop;
 using ICSharpCode.SharpDevelop.Editor.Dialogs;
 using ICSharpCode.SharpDevelop.Gui;
 using ICSharpCode.SharpDevelop.Refactoring;
@@ -37,7 +38,11 @@ namespace ICSharpCode.SharpDevelop.Editor.Commands
 		{
 			var entity = GetEntity(symbol);
 			if (entity != null) {
-				RenameSymbolDialog renameDialog = new RenameSymbolDialog(CheckName)
+				var project = entity.ParentAssembly.GetProject();
+				if (project != null) {
+					var languageBinding = project.LanguageBinding;
+					
+					RenameSymbolDialog renameDialog = new RenameSymbolDialog(name => CheckName(name, languageBinding))
 					{
 						Owner = SD.Workbench.MainWindow,
 						OldSymbolName = entity.Name,
@@ -51,20 +56,15 @@ namespace ICSharpCode.SharpDevelop.Editor.Commands
 					}
 				}
 			}
+		}
 		
-		bool CheckName(string name)
+		bool CheckName(string name, ILanguageBinding language)
 		{
-			// TODO implement for current language!
 			if (string.IsNullOrEmpty(name))
 				return false;
 			
-			for (int i = 0; i < name.Length; i++) {
-				char thisChar = name[i];
-				if (!Char.IsLetter(thisChar)
-				    && !Char.IsDigit(thisChar)
-				    && (thisChar != '_'))
+			if ((language.CodeDomProvider == null) || !language.CodeDomProvider.IsValidIdentifier(name))
 				return false;
-			}
 			
 			return true;
 		}