C# SortedSet Reverse

public IEnumerable<T> Reverse()

/* ww  w  .ja  v  a 2  s .  c om*/
using System;
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");

        set1.SymmetricExceptWith(set2);

        IEnumerable<String> ie = set1.Reverse();

        foreach (string s in ie)
        {
            Console.WriteLine(s);
        }


    }
}