public override int InsertGroup(Group group)
 {
     var context = new FriendsEntities();
     var obj = new tblFriends_Groups();
     group.CopyToObject(obj);
     context.AddTotblFriends_Groups(obj);
     context.SaveChanges();
     return obj.Id;
 }
 public override void UpdateGroup(Group group)
 {
     var context = new FriendsEntities();
     var obj = new tblFriends_Groups {Id = group.Id};
     context.AttachTo("tblFriends_Groups", obj);
     group.CopyToObject(obj);
     context.SaveChanges();
 }