BaconographyWP8.MainPage.MenuSidebar_Click C# (CSharp) Method

        private void MenuSidebar_Click(object sender, EventArgs e)
        {
            if (pivot.SelectedItem is PivotItem &&
                ((PivotItem)pivot.SelectedItem).DataContext is RedditViewModel)
            {
                var vm = ((PivotItem)pivot.SelectedItem).DataContext as RedditViewModel;

                var _navigationService = ServiceLocator.Current.GetInstance<INavigationService>();
                _navigationService.Navigate(typeof(AboutSubreddit), new Tuple<string>(vm.SelectedSubreddit.Data.Url));
            }
        }