EF Feature CTP5 下载地址:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=35adb688-f8a7-4d28-86b1-b6235385389d
EF团队博客:http://blogs.msdn.com/b/adonet/archive/2010/12/14/ef-feature-ctp5-released.aspx
