using System;
using System.Collections;

class Test
{
   static void Main()
   {
      ArrayList list1 = new ArrayList();
      list1.Add("Hello");
      list1.Add("World");
      ArrayList list2 = new ArrayList();
      list2.Add("Goodbye");
      list2.Add("Cruel");
      list2.Add("World");
      ArrayList list2D = new ArrayList();
      list2D.Add(list1);
      list2D.Add(list2);

      // access all elements
      foreach(ArrayList list in list2D)
      {
          foreach(string s in list)
          {
              Console.Write("{0} ", s);
          }
          Console.WriteLine();
      }
      
      // access individual element say at [0,0]
      ArrayList al = (ArrayList)list2D[0];
      string element = (string)al[0];
      Console.WriteLine("The element at [0,0] is {0}", element);
      Console.ReadKey();      
   }
}