using System;

using System.Collections.Generic;

using System.Linq;

using NUnit.Framework;

​

namespace DennisSpace

{

    public class Program

    {

        public static void Main()

        {

            var x = new NUnitLite.AutoRun().Execute(new string[]{"--test:DennisSpace.SolutionTests", "--noc"});

            Console.WriteLine("");

            Console.WriteLine("----------------------------------------------");

            Console.WriteLine(x == 0 ? "All Test Passed... :¬)" : string.Format("{0} tests failed... :¬(", x));

            Console.WriteLine("----------------------------------------------");

        }

​

        public static string UniqueInOrder<T>(IEnumerable<T> iterable)

        {

            var output = "";

            var list = iterable.ToList();

            for (var i = 0; i < list.Count; i++)

            {

                Console.WriteLine(list[i]);

                var unique = false;

                if (!EqualityComparer<T>.Default.Equals(list[i], list[i+1]))

                {

                    unique = true;

                }

                if (unique) {

                    output +=list[i];

                }

            }

​

            return output;

        }

    }

​

    // Unit Tests

    [TestFixture]

    public class SolutionTests

    {

        [Test]

        public void Test1()

        {

            var expected = "ABCDAB";

            Assert.AreEqual(expected, Program.UniqueInOrder("AAAABBBCCDAABBB"));

        }

    }

}