http://blogs.msdn.com/mshneer/archive/2008/11/03/type-equivalence-and-type-safety.aspxWhat one should do on a plane back from the PDC? Of course! Write a new blog post! So, since I still have some topics to cover on the whole NOPIA shabang - here we go. CLR’s 4.0 support for Type Equivalence allows you to define your own copy of an interface,en-USCommunityServer 2.1 SP1 (Build: 61025.2)