发布Key.App时，WPF上下文菜单消失

Question

当我通过“Appkey”打开时，我遇到了上下文菜单的问题，请参考this link for same issue以供参考。在这里我没有通过 keyUp或Keydown 来处理事件，但是通过XAML Commandbinding和Inputbinding我在代码隐藏中打开上下文菜单，我的问题是如何让关键字菜单保持打开状态被释放。

  <UserControl.CommandBindings>
         <!--Custom Commands-->
        <CommandBinding Command="my:ThumbnailImages.CustomCommandContextMenu" Executed="OpenContextMenu_Executed" />
    </UserControl.CommandBindings>
    <UserControl.InputBindings>
        <KeyBinding Command="my:ThumbnailImages.CustomCommandContextMenu" Key="Apps"/>
    </UserControl.InputBindings>

<ListBox.ContextMenu>
   <ContextMenu Name="ZoneIformationList" StaysOpen="true" Background="WhiteSmoke">
      <ContextMenu.BitmapEffect>
         <BitmapEffectGroup/>
      </ContextMenu.BitmapEffect>
      <MenuItem Header="Edit" Name="EditNutritionContextMenu"  />
      <MenuItem Header="Remove" Name="RemoveNutritionContextMenu" />
   </ContextMenu>
</ListBox.ContextMenu>

  Private Sub OpenContextMenu_Executed(ByVal sender As System.Object, ByVal e As System.Windows.Input.ExecutedRoutedEventArgs)

        If IsNothing(MyList.ContextMenu) = False Then
            MyList.ContextMenu.PlacementTarget = MyList
            MyList.ContextMenu.IsEnabled = True
            MyList.ContextMenu.IsOpen = True

            e.Handled = True
        End If
    End Sub
End Class