Silverlight 4: Resolving Microsoft.Silverlight.CSharp.targets was not found?

Question

I\'ve been upgrading some Silverlight 3 apps to Silverlight 4 in Visual Studio 2010. My Silverlight 3 apps open fine in Visual Studio, but SL4 apps don\'t, with the followin

Answer 1

This worked well for me...also had to install Silverlight 4 Developer runtime