private void detach_AccountInvoices(AccountInvoice entity)
		{
			this.SendPropertyChanging();
			entity.InvoiceHeader = null;
		}
		private void attach_AccountInvoices(AccountInvoice entity)
		{
			this.SendPropertyChanging();
			entity.Account = this;
		}
 partial void UpdateAccountInvoice(AccountInvoice instance);
 partial void DeleteAccountInvoice(AccountInvoice instance);
 partial void InsertAccountInvoice(AccountInvoice instance);