What is index-based I/O ArrayList collection in C#?

ArrayList class represents an ordered collection of an object that can be indexed individually. It is an alternative to an array.

The following table lists some of the commonly used properties of the ArrayList class −

The following is an example showing how to work with ArrayList in C# and finding the capacity. The default capacity is 4.

Example

using System;
using System.Collections;

namespace Demo {
   class Program {
      static void Main(string[] args) {
         ArrayList x = new ArrayList();

         x.Add(45);
         x.Add(53);
         x.Add(12);
         x.Add(88);

         Console.WriteLine("Capacity: {0} ", x.Capacity);
      }
   }
}