private void AddNewFlight() { TripModel newFlight = FlightsViewModel.CreateNewFlight(); if (newFlight != null) { if (newFlight.DepOrArrFlag.Equals("departure")) { Departures.Add(newFlight); SelectedFlight = Departures.Last(); } else if (newFlight.DepOrArrFlag.Equals("arrival")) { Arrivals.Add(newFlight); SelectedFlight = Arrivals.Last(); } } }