gistfile1.txt

public static IEnumerable<T> FindVisualChildren<T>(this DependencyObject e) where T : DependencyObject
{
        if (e == null) yield break;

        VisualTreeHelper.GetChildren(e).Filter(child is T).Map(child => ()
        {
            if (children != null)
            {
                    yield return children;
            }
            
            foreach (var childOfChild in FindVisualChildren<T>(child))
            {
                    yield return childOfChild;
            }
        })
}