private void detach_PurchaseOrderDetails(PurchaseOrderDetail entity)
		{
			this.SendPropertyChanging();
			entity.PurchaseOrderHeader = null;
		}
		private void attach_PurchaseOrderDetails(PurchaseOrderDetail entity)
		{
			this.SendPropertyChanging();
			entity.Product = this;
		}
 partial void UpdatePurchaseOrderDetail(PurchaseOrderDetail instance);
 partial void DeletePurchaseOrderDetail(PurchaseOrderDetail instance);
 partial void InsertPurchaseOrderDetail(PurchaseOrderDetail instance);