app.config “Could not find schema information” after converting to Visual Studio 2010 / .Net 4.0

Question

After upgrading my project to Visual Studio 2010 and .Net 4.0, my app.config file generates these messages upon building the project:

• Could not find schema inf

Answer 1

Are you sure the conversion went ok? Maybe the correct target framework wasn't configured. Open your project properties and check if the target framework is actually .NET Framework 4 or .NET Framework 4 Client Profile.