WPF - ItemsControl - 如何找到ItemTemplate中的"CheckBox"项？

   <ItemsControl.ItemTemplate>
        <DataTemplate>
           <CheckBox Content="{Binding Name}" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

private List<CheckBox> FindCheckBoxes(ItemsControl itemsControl)
{
    List<CheckBox> checkBoxes = new List<CheckBox>();

    for (int i = 0; i< itemsControl.Items.Count; i++)
    {
        var item = itemsControl.ItemContainerGenerator.ContainerFromIndex(i) as ContentPresenter;
        if (item != null)
        {
            var checkBox = FindVisualChild<CheckBox>(item);
            if (checkBox != null)
            {
                checkBoxes.Add(checkBox);
            }
        }
    }

    return checkBoxes;
}

private T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
{
    for (int i = 0; i< VisualTreeHelper.GetChildrenCount(obj); i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(obj, i);
        if (child != null && child is T)
        {
            return (T)child;
        }

        T childItem = FindVisualChild<T>(child);
        if (childItem != null)
        {
            return childItem;
        }
    }

    return null;
}

var checkBoxes = FindCheckBoxes(itemsControl);