private void Button_Click(object sender, RoutedEventArgs e) { if (txtFName.Text != "" && txtLName.Text != "") { var passenger = _fService.CreateNewPersonBooking(txtFName.Text, txtLName.Text); if (passenger != null) { _grid.AddPassengerToList(passenger); } else { MainWindow.ErrorMsg("Fejl! passenger er null"); } } else { MainWindow.ErrorMsg("Begge felter skal udfyldes!"); } }