Automatic conversion isn’t possible at the moment, but doing it manually will also help improve your C# skills. There’s a Top 10 article here that takes you through the common differences:
http://msdn.microsoft.com/en-us/library/aa164018%28office.10%29.aspx
You may also find the following links useful:
The MSDN page for developing Office solutions with C#:
http://msdn.microsoft.com/en-us/library/ms228286.aspx
The MSDN Visual C# application development page (for starting out in C# development):
http://msdn.microsoft.com/en-us/library/aezdt881.aspx
Good luck and I hope this helps.