<Window x:Class="_11HierarchicalDataTemplate.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:_11HierarchicalDataTemplate"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <XmlDataProvider x:Key="KundenListeIntern" XPath="/Kunden" >
            <x:XData>
                <Kunden xmlns="">
                    <Kunde>
                        <Name>Mustermann</Name>
                        <Vorname>Max</Vorname>
                    </Kunde>
                    <Kunde>
                        <Name>Meier</Name>
                        <Vorname>Stefan</Vorname>
                    </Kunde>
                    <Kunde>
                        <Name>Schulz</Name>
                        <Vorname>Sebastian</Vorname>
                    </Kunde>
                </Kunden>
            </x:XData>
        </XmlDataProvider>

        <HierarchicalDataTemplate DataType="Kunden" ItemsSource="{Binding XPath=*}">
            <TextBlock FontSize="16" FontWeight="Bold" Text="Kundenliste"/>
        </HierarchicalDataTemplate>

        <HierarchicalDataTemplate DataType="Kunde" ItemsSource="{Binding XPath=*}">
            <TextBlock Foreground="DarkSlateBlue" FontSize="14" Text="Kunde"/>
        </HierarchicalDataTemplate>

        <DataTemplate DataType="Name">
            <TextBlock FontSize="12" Text="{Binding XPath=.}" />
        </DataTemplate>

        <DataTemplate DataType="Vorname">
            <TextBlock FontSize="12" Text="{Binding XPath=.}" />
        </DataTemplate>
    </Window.Resources>

    <Grid>

        <TreeView ItemsSource="{Binding Source={StaticResource KundenListeIntern}, XPath=.}" />

    </Grid>
</Window>

<StackPanel Orientation="Horizontal">
    <StackPanel Orientation="Vertical">
        <TextBlock Text="Kunde:" />
        <TextBlock DataType="Name" Text="{Binding XPath=.}">
        <TextBlock DataType="Vorname" Text="{Binding XPath=.}">
    </StackPanel>
</StackPanel>