public ViewModelFactory(
     GeoLocationService locationService,
     TripLogDataService dataService)
 {
     _locationService = locationService;
     _dataService     = dataService;
 }
 public NewEntryViewModel(GeoLocationService locationService, TripLogDataService tripLogDataService)
 {
     _locationService    = locationService;
     _tripLogDataService = tripLogDataService;
 }
 public MainViewModel(TripLogDataService dataService)
 {
     _dataService = dataService;
 }
 public MainViewModel(TripLogDataService tripLogDataService)
 {
     _tripLogDataService = tripLogDataService;
 }