<Grid 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <Border Background="Red" Width="200" Height="100">
    <Border.ContextMenu>
      <ContextMenu>
        <MenuItem Header="Option 1">
          <MenuItem Header="Option 1.1"/>
          <MenuItem Header="Option 1.2"/>
        </MenuItem>
        <MenuItem Header="Option 2"/>
        <MenuItem Header="Option 3"/>
      </ContextMenu>
    </Border.ContextMenu>
  </Border>
</Grid>