internal void saveSellingInvoice()
 {
     try {
         if (addSellingInvoicePayment.SelectedInvoice != null)
         {
             if (ShowMessage.confirm(Common.Messages.Information.Info013) == System.Windows.MessageBoxResult.Yes && paymentManagerImpl.saveSellingInvoice())
             {
                 ShowMessage.success(Common.Messages.Success.Success004);
             }
         }
         else
         {
             addSellingInvoicePayment.textBox_invoiceNumber.ErrorMode(true);
         }
     } catch (Exception) {
     }
 }