Entity Framework Code Only option
June 12th, 2009
.NET 4.0 and VS 2010 introduce a new feature for the Entity Framework called model first. In addition, you will now be able to have a code only model. Written with POCOs and a simple class derived from ObjectContext and you are on the way…
http://blogs.msdn.com/efdesign/archive/2009/06/10/code-only.aspx