ReactiveUi如何在入门示例中使用ICollectionView

public class MyViewModel : ReactiveObject
{
    private readonly ObservableCollection<string> _myCollection;
    private ICollectionView _myCollectionView;

    public MyViewModel()
    {
        _myCollection = new ObservableCollection<string>
        {
            "Item 1",
            "Item 2",
            "Item 3"
        };

        _myCollectionView = CollectionViewSource.GetDefaultView(_myCollection);
    }

    public ICollectionView MyCollectionView
    {
        get => _myCollectionView;
        set => this.RaiseAndSetIfChanged(ref _myCollectionView, value);
    }
}

<ListBox ItemsSource="{Binding MyCollectionView}" />

_myCollectionView.SortDescriptions.Add(new SortDescription("Length", ListSortDirection.Ascending));