private void detach_accounts(account entity)
 {
     this.SendPropertyChanging();
     entity.user = null;
 }
 private void attach_accounts(account entity)
 {
     this.SendPropertyChanging();
     entity.user = this;
 }
 partial void Updateaccount(account instance);
 partial void Deleteaccount(account instance);
 partial void Insertaccount(account instance);