Every time I wish to try Visual Studio 2012 I find that there is not Silverlight Toolkit for Visual Studio 2012, so I switch back to Visual Studio 2010 for new projects.
Comments: ** Comment from web user: ogellein **
Comments: ** Comment from web user: ogellein **
Check that all References in the project is referred to Silvelight 5 dlls.
Error on 'System.Windows.Controls.Toolkit.Internals' may come if one of the other DLLs are from the silverlight 4 toolkit.