Avalonia 绑定集合时，如何更新显示每个数据项的序号

 #region 实现序号功能
 /// <summary>
 /// 新的数据被绑定到itemscontrol
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void MixerTrackItemsControl_ContainerPrepared(object? sender, ContainerPreparedEventArgs e)
 {
     var track = e.Container.DataContext as TrackViewModel;
     track.TrackNumber = e.Index + 1;
 }

 /// <summary>
 /// 当控件的index发生变化时触发
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void MixerTrackItemsControl_ContainerIndexChanged(object? sender, ContainerIndexChangedEventArgs e)
 {
     var track = e.Container.DataContext as TrackViewModel;
     track.TrackNumber = e.NewIndex + 1;
 }
 #endregion

ItemsControl这两个事件，可以用来更新每个数据项的number