FindVisualChild in WinRT

gistfile1.cs

        private T FindVisualChild<T>(DependencyObject obj)
            where T : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                if (child != null && child is T)
                    return (T) child;
                else
                {
                    T childOfChild = FindVisualChild<T>(child);
                    if (childOfChild != null)
                        return childOfChild;
                }
            }
            return null;
        }