public IList <Factura> FiltroTotalDEs()
 {
     try
     {
         Conection.Open();
         Facturas = FacturaRepositorio.FiltroTotalDesc();
         Conection.Close();
         return(Facturas);
     }
     catch (OracleException ex)
     {
         Conection.Close();
         return(null);
     }
 }