private void BtnBuscar_Click(object sender, EventArgs e) { string placa = textInputEditTextPlacaFacturar.Text != null ? textInputEditTextPlacaFacturar.Text : string.Empty; ValidadObligatoriedadDeCampos(placa); if (placa != string.Empty) { try { vehiculoDeSalida = services.ObtenerVehiculoPorPlaca(placa); FijarPrecioAPagar(vehiculoDeSalida); } catch (ParkingAccessException exception) { Toast.MakeText(Application.Context, exception.Message, ToastLength.Short).Show(); } } }