Hide scrollbar Contextmenu in wpf.

<window x:class="Window1" xmlns:x="#unknown">
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <grid>
 <Listview name="listview">
        <scrollbar>
            <scrollbar.contextmenu>
                <contextmenu visibility="Collapsed" />
            </scrollbar.contextmenu>
        </scrollbar>
 </Listview>
    </grid>
</window>