partial void DeleteBillDemandDistribution(BillDemandDistribution instance);
 partial void UpdateBillDemandDistribution(BillDemandDistribution instance);
		private void detach_BillDemandDistributions(BillDemandDistribution entity)
		{
			this.SendPropertyChanging();
			entity.BillDemand = null;
		}
 partial void InsertBillDemandDistribution(BillDemandDistribution instance);
		private void attach_BillDemandDistributions(BillDemandDistribution entity)
		{
			this.SendPropertyChanging();
			entity.Demand = this;
		}