Ah, I didn't read your post carefully enough. There's virtually no chance of finding something that will convert even VB6 code to C#. You can convert VB.NET to C# and back because they both use the .NET Framework class library. You can upgrade VB6 code to VB.NET because Microsoft have specifically included an entire namespace of classes designed to make VB6 code upgradable to VB.NET. That namespace could be referenced in C# project but to do so would be an abomination. Most VB developers that I've conversed with recommend rewriting by hand even when upgrading code from VB6 to VB.NET. There's not too much code there though so the upgrade wizard should be able to handle it OK.