asp.net - Compiler executable file csc.exe cannot be found -

I am using VS 2008 and .Net Framework 3.5 when I compile the project to get the error < / P>

The compiler can not find executable file csc.exe.

I have checked that csc.exe also exists in the .NET Framework folder.

When I change compiler version 3.5 to 2.0 then it starts

I've tried everything, install the Update Net framework, the latest service pack.

Please help me out of this problem.

P>