public void Obtener()
 {
     ICostoFinancieroRepository repository = new CostoFinancieroRepository(new VentaContext());
     List <CostoFinanciero>     bancos     = repository.Obtener(1).ToList();
 }
        public static Task <List <CostoFinanciero> > ObtenerAsync(int idTarjeta)
        {
            ICostoFinancieroRepository costoFinancieroRepository = new CostoFinancieroRepository(new VentaContext());

            return(costoFinancieroRepository.Obtener(idTarjeta));
        }