Check if SortedSet and the specified collection contain the same elements in CSharp

using System;//w ww. j a va  2  s.c o  m
using System.Collections;
using System.Collections.Generic;
using System.IO;


class Program
{
    static void Main(string[] args)
    {
        SortedSet<string> set1 = new SortedSet<string>();
        set1.Add("a");
        set1.Add("b");
        set1.Add("d");
        set1.Add("d");
        
        SortedSet<string> set2 = new SortedSet<string>();
        set2.Add("a");
        set2.Add("b");
        set2.Add("c");
        set2.Add("d");
        
        Console.WriteLine(set1.SetEquals(set2));

    }
}