You can get list of available NuGet packages for Visual Studio using Package Manager Console (in VS – Tools / NuGet Package Manager / Package Manager Console).

In opened console use the code like below to get available versions of package:

PM> Get-Package -ListAvailable -Filter Entityframework –AllVersions

The result is something like this:

Id                             Version              Description/Release Notes                                                                                 

--                             -------              -------------------------                                                                                

EntityFramework                5.0.0                Entity Framework is Microsoft's 
recommended data access technology for new applications.                 

EntityFramework                6.1.3                Entity Framework is Microsoft's 
recommended data access technology for new applications.