private void detach_USERSOFGROUPs(USERSOFGROUP entity)
		{
			this.SendPropertyChanging();
			entity.GROUP = null;
		}
		private void attach_USERSOFGROUPs(USERSOFGROUP entity)
		{
			this.SendPropertyChanging();
			entity.GROUP = this;
		}
 partial void UpdateUSERSOFGROUP(USERSOFGROUP instance);
 partial void DeleteUSERSOFGROUP(USERSOFGROUP instance);
 partial void InsertUSERSOFGROUP(USERSOFGROUP instance);