private void comboBox1_SelectedValueChanged(object sender, EventArgs e) { if (cmboRoute.SelectedItem == null) { return; } List <Stop> stops = _backend.RequestListOfStopsForRoute(SelectedRoute); Stop selectedStop = null; if (SelectedRoute.RouteNo == ConfigSettings.Default.RouteNumber) { selectedStop = stops.Where(z => z.StopNo == ConfigSettings.Default.StopNumber).FirstOrDefault(); } cmboStop.DataSource = stops; cmboStop.SelectedItem = selectedStop; }