实体框架：无法识别的元素“提供者”例外

I get an Unrecognized element 'providers' exception at runtime when I use Entity Framework 5.0.0 with .NET 4.0. Actually with .NET 4.0 it's the version 4.4.0 of Entity Framework that is loaded when I do an install-package with NuGet. When I check the properties of the file from explorer I can see this: excep