using System;

using System.Collections.Generic;

​

namespace IDcs

{

    public class Program

    {

        public static void Main(string[] args)

        {

            HashSet<int> hash = new HashSet<int>();

            hash.Add(51);

            hash.Add(13);

            hash.Add(73);

            hash.Add(7);

            hash.Add(3);

            hash.Add(17);

            Console.WriteLine("HashSet: ");

            foreach (int i in hash)

                Console.WriteLine(i);

             Console.WriteLine();

            Console.WriteLine("Count: " + hash.Count);  

            HashSet<int> hash2 = new HashSet<int>();

            hash2.Add(57);

            hash2.Add(21);

            foreach (int i in hash2)

                Console.WriteLine(i);

            Console.WriteLine("Apakah value hash2 ada didalam hash 1 ? = " + hash2.IsSubsetOf(hash)); 

            hash.Clear();

            Console.WriteLine("Count: " + hash.Count);

        }

    }

}

​