var t = CardtypeBizCom.GetInstance().GetModelByPK(421);
var t2 = Mapper.Map<Cardtype, Cardtype>(t);//id没被过滤
//copyObject(t, t2);
t2.Cardtypename = "4444";
CardtypeBizCom.GetInstance().Add(t2)
a different object with the same identifier value was already associated with the session
原文：http://www.cnblogs.com/aaa6818162/p/4818186.html