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

You may get this with Silverlight version 4 projects when trying to open in version 5 if version 4 bits are not on that machine. What has worked for me (after several hours of trying everything) is to edit the csproj file and change the silverlight target version

v4.0

From 4 to 5