Visual Studio 2010: Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0'

Question

We are currently migrating all our solutions from 2005 to 2010 (that\'s right, we\'re skipping 2008!). We are also changing our file structure to make some more sense (some

Answer 1

I was getting this error this morning. I just did the following:

1. Rebuild the Project
2. Closed Visual Studio
3. Re-opened Visual Studio

and the error was gone.