[Windows Phone] Common Language Runtime detected an invalid program

Today, open Microsoft Visual Studio 2010 express for Windows Phone, open a project, double-click the XAML file, and you will find that you cannot open the interface editor. The following error occurs:

An unhandled exception has occurred.

System. invalidprogramexception

Common Language Runtime detected an invalid program.

......

 

Solution: uninstall Silverlight and reinstall Silverlight 4.

It may be caused by incompatibility of the version after the system automatically upgrades Silverlight.

In order to solve this problem, we have been engaged in sharing for a long time, so that some people may also waste more time.