using System;
using System.Collections.Generic;
public class Program
{
public static void Main()
HashSet<int> set1 = new HashSet<int>();
set1.Add(1);
set1.Add(2);
set1.Add(3);
HashSet<int> set2 = new HashSet<int>();
set2.Add(1);
set2.Add(2);
set2.Add(3);
Console.WriteLine("== : " + (set1 == set2 ));
Console.WriteLine("SetEquals : " + (set1.SetEquals(set2) ));
}