Visual Studio已经停止了win7的工作

I have Win 7 Enterprise. If i open any .cs file on VS 2008/2010 it gives a message " Visual Studio has stopped working" on a dialog box. There are two buttons "Debug" and "close program". Debug button starts devenv in debug mode with assembly code as i do not have the pdb file for the same.I have Win 7 Enterprise. If i open any .cs file