MainWindow.xaml

<Window x:Class="Bind_to_SelfReferential_Data.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:Bind_to_SelfReferential_Data"
        Title="MainWindow" Height="350" Width="525"
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid">
    <Grid>
        <dxg:GridControl x:Name="grid">
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="Name" Header="Employee Name"/>
                <dxg:GridColumn FieldName="Position"/>
                <dxg:GridColumn FieldName="Department"/>
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TreeListView AutoWidth="True"
                                  KeyFieldName="ID" ParentFieldName="ParentID"
                                  AutoExpandAllNodes="True"
                                  TreeDerivationMode="Selfreference"/>
            </dxg:GridControl.View>
        </dxg:GridControl>
    </Grid>
</Window>