<Window x:Class="ComboBox_Selection_Changed_Handling_WPF.Window1"
    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"
    Title="Window1" Height="300" Width="300">
    <Grid>
		<Grid.Resources>
			<Style TargetType="telerik:RadComboBox" >
				<EventSetter Event="SelectionChanged" Handler="ComboBox_SelectionChanged" />
			</Style>
		</Grid.Resources>
		
		<telerik:RadGridView x:Name="RadGridView1" AutoGenerateColumns="False">
			<telerik:RadGridView.Columns>
				<telerik:GridViewComboBoxColumn DataMemberBinding="{Binding CountryID}" DisplayMemberPath="Name" SelectedValueMemberPath="ID" />
				<telerik:GridViewDataColumn DataMemberBinding="{Binding FirstName}" />
				<telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" />
			</telerik:RadGridView.Columns>
		</telerik:RadGridView>
	</Grid>
</Window>
 