这个红框里的东西是不是在vs2013里才有?
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http://msdn.microsoft.com/en-us/data/jj200620.aspx
You will need to have Visual Studio 2012 or Visual Studio 2013 installed to complete this walkthrough.
You will also need version 6.1 (or later) of the Entity Framework Tools for Visual Studio installed. See Get Entity Framework for information on installing the latest version of the Entity Framework Tools.
写的很清楚。