<Window x:Class="RadTreeListView_ComboBoxColumn_WPF.MainWindow"
		xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
		xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
		xmlns:my="clr-namespace:RadTreeListView_ComboBoxColumn_WPF"
		Title="MainWindow" Height="700" Width="700">
	<Window.Resources>
		<my:MyViewModel x:Key="MyViewModel"/>
	</Window.Resources>
	<Grid DataContext="{StaticResource MyViewModel}">
		<telerik:RadTreeListView x:Name="clubsTreeListView" ItemsSource="{Binding Clubs}" AutoGenerateColumns="False">
			<telerik:RadTreeListView.ChildTableDefinitions>
				<telerik:TreeListViewTableDefinition ItemsSource="{Binding Players}" />
			</telerik:RadTreeListView.ChildTableDefinitions>
			<telerik:RadTreeListView.Columns>
				<telerik:GridViewDataColumn DataMemberBinding="{Binding Name}"/>
				<telerik:GridViewComboBoxColumn Header="Country" DataMemberBinding="{Binding CountryID}" 
												SelectedValueMemberPath="ID" 
												DisplayMemberPath="Name"
												ItemsSource="{Binding Countries}"/>
			</telerik:RadTreeListView.Columns>
		
		</telerik:RadTreeListView>
			
	</Grid>
</Window>
