Looks like MSVS 11.0 Beta spoiled a MSVS 10.0 installation

Question

I ran into compilation problems with my MSVS 10 after installing MSVS 11Beta. Now, when I compile my C# Projects in MSVS 10 (Projects created in MSVS 10; Target framework: 3.5),

Answer 1

In my case, I received that error message when trying to build a solution on a 32-bit Windows 7 machine. The way to resolve the error for me was to right-click on the project, choose properties, then go to the Build tab. In here I changed the "Platform target" from "Any CPU" to "x86". HTH