private void detach_twits(twit entity)
 {
     this.SendPropertyChanging();
     entity.user = null;
 }
 private void attach_twits(twit entity)
 {
     this.SendPropertyChanging();
     entity.user = this;
 }
 partial void Updatetwit(twit instance);
 partial void Deletetwit(twit instance);
 partial void Inserttwit(twit instance);