partial void DeletetDealCity(tDealCity instance);
 partial void UpdatetDealCity(tDealCity instance);
		private void detach_tDealCities(tDealCity entity)
		{
			this.SendPropertyChanging();
			entity.tCategory = null;
		}
 partial void InserttDealCity(tDealCity instance);
		private void attach_tDealCities(tDealCity entity)
		{
			this.SendPropertyChanging();
			entity.tDeal = this;
		}