protected bool ValidateAllocation()
{
SortedBindingList <InputInvoiceInfo> invoices = Datos_Lineas.DataSource as SortedBindingList <InputInvoiceInfo>;
IEnumerable <ITransactionPayment> lines = invoices.Cast <ITransactionPayment>();
_action_result = PaymentCommon.ValidateAllocation(_entity, _deallocated, lines);
return(_action_result == System.Windows.Forms.DialogResult.OK);
}