前端代码：

<Window x:Class="Demo.Xml621"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Xml621" Height="210" Width="260">
    <Window.Resources>
        <XmlDataProvider x:Key="xdp" XPath="FileSystem/Folder">
            <x:XData>
                <FileSystem xmlns="">
                    <Folder Name="Books">
                        <Folder Name="Programming">
                            <Folder Name="Windows">
                                <Folder Name="WPF"/>
                                <Folder Name="MFC"/>
                                <Folder Name="Delphi"/>
                            </Folder>
                        </Folder>
                        <Folder Name="Tools">
                            <Folder Name="Development"/>
                            <Folder Name="Designment"/>
                            <Folder Name="Players"/>
                        </Folder>
                    </Folder>
                </FileSystem>
            </x:XData>
        </XmlDataProvider>
    </Window.Resources>
    <Grid>
        <TreeView ItemsSource="{Binding Source={StaticResource xdp}}">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding XPath=Folder}">
                    <TextBlock Text="{Binding XPath=@Name}"/>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
    </Grid>
</Window>