http://msmvps.com/blogs/matthieu/archive/2009/05/19/play-with-t4.aspxOne of the most important new thing with EF4 (EF v2) is POCO entities (no dependency with EF). Having independent classes is good but code generation also is. Indeed, if we want to change entities we don’t have to do the work twice (one for edmxenCommunityServer 2008.5 SP2 (Build: 40407.4157)