用滑动手势关闭HamburgerMenu

hamburguer menu control ,但我在使用1.5.1版本的控件关闭菜单时遇到问题。对于版本1.4.1,我通过以下方式关闭菜单:

var paneGrid = HamburgerMenu.FindDescendantByName("PaneGrid") as Grid; 
paneGrid.ManipulationMode = ManipulationModes.TranslateX; 
paneGrid.ManipulationCompleted += OnPaneGridManipulationCompleted;

private void OnPaneGridManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e) { 
    if (e.Cumulative.Translation.X < -50) { 
        HamburgerMenu.IsPaneOpen = false; 
    } 
}