AddRange And InsertRange Methods In ArrayList

AddRange and InsertRange method provides a good deals with the Arrays. Both are the methods of ArrayList.
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using System;
using System.Collections;

class AddRangeAndInsertRangeWithArrayList
{
        static void Main()      
{

       int[] arr = {23,4,45,56,78};                        
int[] arr1 = {1,2,3};
         
       ArrayList arrlist = new ArrayList();

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

        arrlist.Add(8);            
arrlist.Add(9);            

            foreach (int v in arrlist)
            {
                Console.Write(v + "\t" );
            }

Console.WriteLine();
Console.WriteLine("\n----------------Add Range Method---------");
arrlist.AddRange(arr);

foreach (int v in arrlist)
            {
                Console.Write(v + "\t" );
            }      
Console.WriteLine();
Console.WriteLine("\n----------------Insert Range Method---------");
arrlist.InsertRange(0, arr1);
   
            foreach (int v in arrlist)
            {
                Console.Write(v + "\t");
            }
         }
}

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