using System;

using System.Collections;

public class Program

{

    public static void Main()

    {

        var arlist1 = new ArrayList();

​

        var arlist2 = new ArrayList()

                            {

                                1, "Bill", " ", true, 4.5, null

                            };

​

        int[] arr = { 100, 200, 300, 400 };

​

        Queue myQ = new Queue();

        myQ.Enqueue("Hello");

        myQ.Enqueue("World!");

​

        arlist1.AddRange(arlist2); //adding arraylist in arraylist 

        arlist1.AddRange(arr); //adding array in arraylist 

        arlist1.AddRange(myQ); //adding Queue in arraylist 

​

        Console.WriteLine("ArrayList Elements");

        Console.WriteLine(arlist1.Count);

        for(int i = 0; i< arlist1.Count; i++)

            Console.WriteLine(arlist1[i]);

    }

}

​