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<Window x:Class="TreeViewTest.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="600">

	<Grid>
		<Grid.ColumnDefinitions>
			<ColumnDefinition Width="100"/>
			<ColumnDefinition/>
		</Grid.ColumnDefinitions>
		<TreeView Grid.Column="0">
			<TreeViewItem Header="親1">
				<TreeViewItem Header="子1"/>
				<TreeViewItem Header="子2">
					<TreeViewItem Header="孫1" />
					<TreeViewItem Header="孫2" />
				</TreeViewItem>
				<TreeViewItem Header="子3">
					<TreeViewItem Header="孫1" />
					<TreeViewItem Header="孫2" />
					<TreeViewItem Header="孫3" />
				</TreeViewItem>
			</TreeViewItem>
			<TreeViewItem Header="親2">
				<TreeViewItem Header="子1" />
				<TreeViewItem Header="子2" />
			</TreeViewItem>
		</TreeView>
	</Grid>
</Window>