ArcGISPortalViewer.Controls.LiveTile.OnItemsSourcePropertyChanged C# (CSharp) Method

        private static void OnItemsSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var ctrl = (d as LiveTile);
            if (e.NewValue is IEnumerable)
            {
                if (ctrl._currentElement != null && ctrl._nextElement != null)
                    ctrl.Start();
            }
            else if (ctrl._timer != null)
                ctrl._timer.Stop();
        }