Unable to Start Debugging. The Silverlight managed debugging package isn't installed

Recently i got this error while debugging the silverlight application. When i have googled a bit, i found most of the answers as latest developer runtime is not installed. but this was not my problem.

Problem Cause:
i have uninstalled the silverlight browser plugin and reinstalled it. So this was causing the problem


Solution:
i have re-installed the silverlight_tools.exe. this has solved the problem