<Window x:Class="WPF_TreeView_BindCheckState.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WPF_TreeView_BindCheckState"
        xmlns:telerikNavigation="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"
        Title="Window1" Height="300" Width="300">
    
    <Window.Resources>
        <local:TreeViewDataSource x:Key="dataSource" />
    </Window.Resources>
    
    <Grid>
        <telerikNavigation:RadTreeView x:Name="treeView"
                         Checked="treeView_Checked"
                         IsOptionElementsEnabled="True"
                         ItemsSource="{StaticResource dataSource}" />
    </Grid>
</Window>
