private void NavigationPanel_Loaded(object sender, RoutedEventArgs e)
        {
            mHeaderList = VisualHelper.FindVisualChildrenEx <AduGroupBoxNor>(this.PART_ContentPresenter);
            if (mHeaderList != null)
            {
                List <object> list = new List <object>();
                mHeaderList.ForEach(p => list.Add(p));
                this.ItemsSource = list;
            }
            this.mScrollViewer = VisualHelper.FindVisualChild <ScrollViewer>(this.PART_ContentPresenter);
            if (this.mScrollViewer != null)
            {
                this.mScrollViewer.ScrollChanged += MScrollViewer_ScrollChanged;
            }

            object item = this.mHeaderList[this.IndicatorSelectedIndex];

            this.ScrollToSelection(item);
        }