private void detach_InvoiceCodes(InvoiceCode entity)
		{
			this.SendPropertyChanging();
			entity.Invoice = null;
		}
		private void attach_InvoiceCodes(InvoiceCode entity)
		{
			this.SendPropertyChanging();
			entity.Invoice = this;
		}
 partial void UpdateInvoiceCode(InvoiceCode instance);
 partial void DeleteInvoiceCode(InvoiceCode instance);
 partial void InsertInvoiceCode(InvoiceCode instance);