I have installed Visual Studio 2010 (VB.net) and work without problem, but C# 4.0 don't work.
Attached some Screenshot about the errors.
I have installed C# 4.0 and not work and after uninstall it I was installed C# 4.0 (express edition) with some result.
I have win7 and 4.0 framework installed.
Someone can help me to solve this problem ?