using System;

using System.Collections.Generic;

​

namespace Comparer

{

    public class Program

    {

        public static void Main(string[] args)

        {

            Console.WriteLine("Hello World!");

            var list = new[]{"Foobar", "Baz", "Foo", "Foobar", "Bar", };

            Array.Sort(list, new CustomComparer(new[]{"Foo", "Bar", "Baz", "Foobar"}));

            list.Dump();

        }

    }

​

    public class CustomComparer : IComparer<string>

    {

        private readonly string[] priorityList = {"Foo", "Bar", "Baz", "Foobar"};

        public CustomComparer(string[] priorityList)

        {

            this.priorityList = priorityList;

        }

​

        // Compares by Height, Length, and Width.

        public int Compare(string x, string y)

        {

            var xIx = Array.IndexOf(priorityList, x);

            var yIx = Array.IndexOf(priorityList, y);

            return xIx.CompareTo(yIx);

        }

    }

}