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

问题背景：

调试Silverlight应用程序时产此此错误.

silverlight application :Silverlight 2 Beta 2

IE Silverlight plugin vesion：v4.0 Silverlight_Developer

 

错误信息：

 调试silverlight3应用程序出现Unable to Start Debugging. The Silverlight managed debugging package isn't installed

 产生原因：

 

silverligth版本不一致造成的。

解决方法：

 install Silverlight_Developer.exe

  download: 

/Files/pengxiaojun/Silverlight_Developer.rar

 

I hope it will resolve your problems