partial void DeleteBillDemandPath(BillDemandPath instance);
 partial void UpdateBillDemandPath(BillDemandPath instance);
		private void detach_BillDemandPaths(BillDemandPath entity)
		{
			this.SendPropertyChanging();
			entity.BillDemand = null;
		}
 partial void InsertBillDemandPath(BillDemandPath instance);
		private void attach_BillDemandPaths(BillDemandPath entity)
		{
			this.SendPropertyChanging();
			entity.BillDemand = this;
		}