c# change framework error

Question

I am running Visual Studio 2010. I just change the frame work of my project from 4.0 to 3.5. I removed the reference Microsoft.Framework that it asked me to remove then trie

Answer 1

Not sure about this, but since the other answers didn't help, try this. The Version=4.0.0.0 in your file is telling the compiler to use .net 4.0 assemblies. Try changing them to Version=3.5.0.0 or Version=2.0.0.0 and see if that solves it.