Error in Silverlight Application 2103

1)How to fix: Handler “PageHandlerFactory-Integrated” has a bad module “ManagedPipelineHandler” in its module list

  

%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i

If I had been on a 32 bit system, it would have looked like the following:

%windir%\Microsoft.NET\Framework\v4.0.21006\aspnet_regiis.exe -i

  

2)Error 2103 “Unhandled Error in Silverlight Application

This error “usually happens when you changed the namespace of your app [and] then did not change the Startup Object in the project property

The answer, open the Solution (sln) that has your Silverlight 5 project. Go to the Silverlight project (not the *.Web project), right-click the project and choose Properties. When the Project Properties page comes up, click the Silverlight tab.