using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        HashSet<string> MyHash = new HashSet<string>();

        MyHash.Add("Java");

        MyHash.Add("C#");

        MyHash.Add("PHP");

        MyHash.Add("Python");

        Console.WriteLine("Elements in My Hash1:");

        foreach(var val in MyHash)

    {

        Console.WriteLine(val);

    }

        HashSet<int> MyHash2 = new HashSet<int>() {1,2,3,4,5,6,7,8,9};

        Console.WriteLine("Elements in My Hash2:");

        foreach(var val1 in MyHash2)

        {

            Console.WriteLine(val1);

        }

    }

}

​