I moved the application from silverlight 3 VS2010 to a system with Silverlight 4 and VS 2010. When I open the solution, I get the following error in the MainPAge.xml file. What's wrong.
Failed to resolve mscorlib for target environment "Silverlight, Version = v3.0". This can happen if the target infrastructure is not installed or if the scroll file is incorrectly formatted.
Open the "Properties" of your projects and make sure that the "Target version of Silverlight" in the "Silverlight" section is installed in Silverlight 4.
Silverlight 3, "Target Silverlight Version" 3, "" 4. Visual Studio Silverlight 3.
, SL3 SL4
http://www.a2zmenu.com/Blogs/Silverlight/Migrating-Silverlight-3-to-Silverlight-4.aspx
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