KbtterWPF.MainWindow.fav_Click C# (CSharp) Method

        void fav_Click(object sender, RoutedEventArgs e)
        {
            var tb = (sender as ToggleButton);
            var st = (tb.Tag as StackPanel).Tag as TwitterStatus;
            if (tb.IsChecked == true)
            {
                Service.Favorite(st, (tws, res) =>
                {
                    SetStatusBarWithFavorite(res, tws);
                });
            }
            else
            {
                Service.UnfavoriteTweet(new UnfavoriteTweetOptions { Id = st.Id }, (tws, res) =>
                {
                    SetStatusBarWithFavorite(res, tws);
                });
            }
        }