Visual Studio 2010: Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0'
问题 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 common projects would be nested within specific projects etc etc). This all means references need to be changed! Apart from that we are also setting them all to .NET 4.0. To accomplish this we've made a temp "GOD" solution with all 117 projects in the same solution. I am doing this with one co-worker and until about 2 hours