如何在carouselView中反映CarouselView.ItemsSource中所做的更改？(Xamarin表单)

// 创建一个ViewModel，实现INotifyPropertyChanged接口
public class MyViewModel : INotifyPropertyChanged
{
    private ObservableCollection<string> items;
    public ObservableCollection<string> Items
    {
        get { return items; }
        set
        {
            items = value;
            OnPropertyChanged(nameof(Items));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

// 在XAML中定义CarouselView
<CarouselView ItemsSource="{Binding Items}">
    <CarouselView.ItemTemplate>
        <DataTemplate>
            <Label Text="{Binding .}" />
        </DataTemplate>
    </CarouselView.ItemTemplate>
</CarouselView>

// 在代码中设置数据源和订阅PropertyChanged事件
public partial class MainPage : ContentPage
{
    private MyViewModel viewModel;

    public MainPage()
    {
        InitializeComponent();

        viewModel = new MyViewModel();
        BindingContext = viewModel;

        // 初始化数据源
        viewModel.Items = new ObservableCollection<string>()
        {
            "Item 1",
            "Item 2",
            "Item 3"
        };

        // 订阅PropertyChanged事件
        viewModel.PropertyChanged += ViewModel_PropertyChanged;
    }

    private void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        if (e.PropertyName == nameof(viewModel.Items))
        {
            // 数据源发生更改时，更新CarouselView
            carouselView.ItemsSource = viewModel.Items;
        }
    }
}