问题
I believe Entity Framework 6 is intended for .NET 4.5. I'm wanting to use it for a Visual Studio 2010 project, so .NET 4.5 isn't available.
Does it support .NET 4.0 and hence Visual Studio 2010?
回答1:
Entity Framework 6 does support .NET 4.0. You should update your version of NuGet then try again. You can find the download at http://www.nuget.org/. I successfully downloaded EntityFramework 6.0.0-rc1 from the main nuget.org feed from an application targeting .NET 4.0
回答2:
Entity Framework Version History
EF6 This release can be used in Visual Studio 2013, Visual Studio 2012 and Visual Studio 2010 (runtime only) to write applications that target .NET 4.0 and .NET 4.5.
回答3:
As of writing, on October 2018, latest EF 6.2.0 still supports .NET 4.0 and works very fine in Visual Studio 2010.
来源：https://stackoverflow.com/questions/19239140/does-entity-framework-6-support-net-4-0