private void btn_sumit_Click(object sender, RoutedEventArgs e)
        {
            List <DependencyObject> fs = new List <DependencyObject>();

            foreach (var item in this.sp_all.Children)
            {
                fs.Add(item as DependencyObject);
            }

            StoryBoardService.FountainAnimation(fs);
        }
        /// <inheritdoc/>
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            string             redirectUrl       = Intent.Data.ToString();
            IStoryBoardService storyBoardService = new StoryBoardService();

            if (storyBoardService.ActiveStory != null)
            {
                storyBoardService.ActiveStory.StoreToSession(SynchronizationStorySessionKey.OauthRedirectUrl, redirectUrl);
            }

            // Clear the activity holding the custom tab and return to already running main activity.
            Intent intent = new Intent(this, typeof(MainActivity));

            StartActivity(intent);

            // Stop the redirect activity, its job is already done.
            Finish();
        }