Make conditional for now since there are too many bugs

I'll get this code merged since I think it's a good foundation for future work on this

Author: GrahamTheCoder

ICSharpCode.CodeConverter/CSharp/DocumentExtensions.cs

@@ -41,8 +41,12 @@ public static async Task<Document> WithExpandedRootAsync(this Document document)
                 ? (Func<SemanticModel, SyntaxNode, bool>)ShouldExpandVbNode
                 : ShouldExpandCsNode;
             document = await WorkaroundBugsInExpandVbAsync(document, shouldExpand);
+
+#if SimplifierBugsAreFixed  //See https://github.com/icsharpcode/CodeConverter/pull/449 and https://github.com/icsharpcode/CodeConverter/pull/464
             document = await ExpandVbAsync(document, shouldExpand);
-            return await UndoVbExpansionsHardToReverseInCSharpSemanticModel(document);
+            document = await UndoVbExpansionsHardToReverseInCSharpSemanticModel(document);
+#endif
+            return document;
         }
 
         private static async Task<Document> WorkaroundBugsInExpandVbAsync(Document document, Func<SemanticModel, SyntaxNode, bool> shouldExpand)