Unable to start debugging. The Silverlight managed debugging package isn’t installed.
Recently, when I setup my SL 3.0 development environment on my new laptop, I can across a new error “ Unable to start debugging. The Silverlight managed debugging package isn’t installed.”
“Fig: SL Error - Unable to start debugging “
If you installed latest version of Silverlight (Silverlight 4), it may break the your current Silverlight development environment. After in the Silverlight 4 installation, if you try to debug any Silverlight 3 project, you will get a message from Visual Studio 2008, saying “Unable to start debugging. The Silverlight managed debugging package isn’t installed.”
