using System;

using System.Collections;

using System.Collections.Specialized;

public class Program

{

    public static void Main()

    {

        // Creates and initializes a new NameValueCollection.

      NameValueCollection myCol = new NameValueCollection();

      myCol.Add( "cd2", "1" );

      myCol.Add( "cd2", "2" );

        Console.WriteLine("Hello World =>" + myCol.ToString());

    }

}