The element 'Property Group' in name space http://schemas.microsoft.com/developer/msbuild/2003' has an invalid child.
I am using VS 2010 SP1 + LightSwitch on a Windows Server 2008 x64.
I saw this is a very old problem. Is there a workaround now.
You may have a try to close all of editor windows on this project and rebuild again. Please see this similar thread:
Warnings in Microsoft.Common.Targets while building.
For more information:
Visual Studio Warning: The element 'xxxx' in namespace 'http://schemas.microsoft.com/developer/msbuild/2003' has invalid child element 'yyyy' in namespace 'http://schemas.microsoft.com/developer/msbuild/2003'.
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