Congratulations to the Visual Studio team for releasing the RTM version of Visual Studio 2010!

Unfortunately the RTM release has a known incompatibility issue with the Windows Phone Developer Tools released at Mix. We are working on an update - please see the full post by Charlie over at http://windowsteamblog.com/blogs/wpdev/archive/2010/04/12/visual-studio-2010-rtm-and-the-windows-phone-developer-tools-ctp.aspx