C# sample code for index based sort

indexsort.cs

// Guffa's answer in http://stackoverflow.com/questions/659866/is-there-c-sharp-support-for-an-index-based-sort
using System;
using System.Collections.Generic;
using System.Linq;

namespace IndexSortTest {
    class Program {
        static void Main(string[] args) {
            List<int> list = new List<int> {4, 2, 3, 1, 8};
            int N = list.Count;
            int[] index = Enumerable.Range(0, N).ToArray<int>();
            Array.Sort<int>(index, (a, b) => list[a].CompareTo(list[b]));
            foreach (int i in index) {
                Console.WriteLine("{0}: {1}", i, list[i]);
            }
            Console.ReadLine();
        }
    }
}