gistfile1.cs

void GetComponentsInChildrenRecursive<T> (Transform parent, List<T> buffer)
		where T : Component
	{
		foreach (Transform t in parent) {
			var c = t.GetComponent<T> ();
			if (c) {
				buffer.Add (c);
			}
			GetComponentsInChildrenRecursive (t, buffer);
		}
	}