ArrayList join

ArrayJoin.cs

using System.Collections;
using System.Collections.Generic;

public class ArrayJoin{
    public ArrayJoin()
    {
        ArrayList arrayList = new ArrayList();

        arrayList.Add(1);
        arrayList.Add("two");
        arrayList.Add(3);
        arrayList.Add("four");


        IList<string> strList1 = new List<string>(){"One", "Two", "Three", "Four", "Five" };
        IList<string> strList2 = new List<string>(){"Four", "Five", "Six", "Seven", "Eight"};

        Console.Write("-------------------");
        Console.WriteLine("Except");
        var resultExcept = strList1.Except(strList2);
        foreach(string str in resultExcept)
                Console.WriteLine(str);


        Console.Write("-------------------");
        Console.WriteLine("Intersect");
        var resultIntersect = strList1.Intersect(strList2);
        foreach(string str in resultIntersect)
                Console.WriteLine(str);

        Console.Write("-------------------");
        Console.WriteLine("Concat");
        var resultConcat = strList1.Concat(strList2);
        foreach(string str in resultConcat)
                Console.WriteLine(str);

        Console.Write("-------------------");
        Console.WriteLine("Distinct");
        var resultDistinct = resultConcat.Distinct();
        foreach(string str in resultDistinct)
                Console.WriteLine(str);

        Console.Write("-------------------");
        Console.WriteLine("Union");
        var resultUnion = strList1.Union(strList2);
        foreach(string str in resultUnion)
                Console.WriteLine(str);

    }
}