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 had a similar error in XamarinForms PCL project.
I found out that the error was about a reference of the project. I updated the xamarin.forms to the last version and for some reasons NuGet was not able to remove all references of the previous version from the project file (xml).
So, simply I deleted the following line from the project file and it worked!

Hope it helps someone...