private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            Examples clickedExample = (Examples)(sender as ListBox).SelectedItem;
            var      navCont        = new CodeEditorContext(clickedExample, "Examples");

            Frame.Navigate(typeof(CodeEditor), navCont);
        }
        private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var      selectedId     = (sender as ListBox).SelectedIndex;
            Problems clickedProblem = (Problems)listofitems[selectedId];
            var      navCont        = new CodeEditorContext(clickedProblem, "Problems");

            Frame.Navigate(typeof(CodeEditor), navCont);
        }
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navParam = e.Parameter as CodeEditorContext;

            if (navParam.tableName != "Problems")
            {
                CommandBar   bottomCommandBar = this.BottomAppBar as CommandBar;
                AppBarButton b = bottomCommandBar.PrimaryCommands[0] as AppBarButton;
                //b.Click -= Solution;
                bottomCommandBar.PrimaryCommands.RemoveAt(0);
            }

            createHtmlFileInLocalState();
            this.navigationHelper.OnNavigatedTo(e);
        }