<Window x:Class="GroupColumnHeaders_WPF.MainWindow"
		xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
		xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"
		xmlns:local="clr-namespace:GroupColumnHeaders_WPF"
		xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 
		xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
		Title="MainWindow" Height="350" Width="525">
	<Grid>
        <telerik:RadGridView x:Name="RadGridView1">
			<i:Interaction.Behaviors>
				<local:ColumnGroupsBehavior>
					<local:ColumnGroupsBehavior.CommonHeaders>
						<local:CommonHeader StartColumnIndex="0" Caption="Vehicle Info" ColumnSpan="2" Height="27" />
						<local:CommonHeader StartColumnIndex="2" Caption="Dimensions (mm)" ColumnSpan="3" Height="27" />
						<local:CommonHeader StartColumnIndex="5" Caption="Total" ColumnSpan="1" Height="27" />
					</local:ColumnGroupsBehavior.CommonHeaders>
				</local:ColumnGroupsBehavior>
			</i:Interaction.Behaviors>
		</telerik:RadGridView>
	</Grid>
</Window>
