我可以在没有警告的情况下重新附加或挂起BindingExpression吗?

<Window.Resources>
    <XmlDataProvider x:Key="testDS1">
        <x:XData>
            <root xmlns="">
                <item>1</item>
                <item>1</item>
            </root>
        </x:XData>
    </XmlDataProvider>
</Window.Resources>
<StackPanel>
    <ListBox ItemsSource="{Binding Source={StaticResource testDS1},XPath=/root/item}"/>
    <Button Content="Change" Click="OnChangeClicked"/>
</StackPanel>

这将显示一个数字列表框。然后我执行这个代码。

    public void OnChangeClicked(object sender, RoutedEventArgs e)
    {
        XmlDataProvider ds = Resources["testDS1"] as XmlDataProvider;
        string xml = "<root><item>1</item></root>";
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xml);
        ds.Document = doc;
    }

System.Windows.Data Error: 43 : BindingExpression with XPath cannot bind to non-XML object.; XPath='/root/item' BindingExpression:Path=; DataItem='XmlDataCollection' (HashCode=40644060); target element is 'ListBox' (Name=''); target property is 'ItemsSource' (type 'IEnumerable') XmlDataCollection:'MS.Internal.Data.XmlDataCollection'

但是,ListBox绑定正确并且具有正确的值。从读到这里 thread ,它提到这种行为是正常的,绑定表达式已重新连接。如何消除此警告?我尝试过BindingOperations.ClearBinding,但即使这样也触发了此警告。我应该接受这个警告吗?