BAD.RandomSelector.NodeTask C# (CSharp) Method

        public override IEnumerator<NodeResult> NodeTask()
        {
            var rng = new System.Random ();
            var n = children.Count;
            while (n > 1) {
                n--;
                var k = rng.Next (n + 1);
                var value = children [k];
                children [k] = children [n];
                children [n] = value;
            }

            var task = base.NodeTask ();
            while (task.MoveNext()) {
                yield return task.Current;
            }
        }