public MainWindowModel() { var marker1 = new Marker(1); var marker2 = new Marker(2); var marker3 = new Marker(3); Markers = new ObservableCollection<Marker> { marker1, marker2, marker3 }; }
public void AddMarker() { var id = Markers.Any() ? Markers.Max(x => x.Id) + 1 : 1; var marker = new Marker(id); Markers.Add(marker); }