partial void DeleteInvoice_Detail(Invoice_Detail instance);
partial void UpdateInvoice_Detail(Invoice_Detail instance);
private void detach_Invoice_Details(Invoice_Detail entity) { this.SendPropertyChanging(); entity.Invoice = null; }
partial void InsertInvoice_Detail(Invoice_Detail instance);
private void attach_Invoice_Details(Invoice_Detail entity) { this.SendPropertyChanging(); entity.Product = this; }