问题
Which version of the Entity Framework (EF) I could use in .NET 3.5 and where I could download this older version?
回答1:
For .Net 3.5 you can use EF v1.
Did you try to download Microsoft .NET Framework 3.5 Service Pack 1 from http://www.microsoft.com/download/en/details.aspx?id=22 It should include The first version of Entity Framework (EFv1) as stated on http://en.wikipedia.org/wiki/ADO.NET_Entity_Framework.
来源：https://stackoverflow.com/questions/10330682/download-entity-framework-for-net-3-5