<Window x:Class="WpfApplication1.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">
    <Grid>
        <telerik:RadGridView x:Name="RadGridView1">
            <telerik:RadGridView.Resources>
                <ContextMenu x:Key="MyContextMenu" Opened="ContextMenu_Opened">
                    <MenuItem Header="Item1" />
                    <MenuItem Header="Item2" />
                </ContextMenu>
            </telerik:RadGridView.Resources>
        </telerik:RadGridView>
    </Grid>
</Window>
