//using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

            Node n=new Node();

            n.Add(new Node());

    }

}

​

class Node {

    string value1;

    List<Node> Children;

​

// Function to set the value of this node to empty + all its children

    public void SetNull()

    {

        Queue<Node> queue;

        queue.add(this);

        while(queue.Count > 0)

        {

            Node current = queue.pop;

            queue.add(current.children);

            current.value = string.Empty;

        }

        this.value=null;

    }

}

​

// https://dl.dropboxusercontent.com/u/985868/201602/tree.png

// https://dotnetfiddle.net/#&togetherjs=aDcvrLSEpy