C# ArrayLists

C# ArrayLists

ArrayLists is the type of the non-generic collection in C#. It can contain elements of any data type and it is similar to an array except that it can grow automatically.

Let’s see how to create an ArrayLists in C#.

 
using System;
using System.Collections; //Add this namespace

namespace ConsoleAppDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            ArrayList progLangsArr = new ArrayList(); //Don't forget to add the using System.Collections namespace
            progLangsArr.Add(1);
            progLangsArr.Add("Billy");
            progLangsArr.Add("C");
            progLangsArr.Add(true);
            progLangsArr.Add(5.6);
            progLangsArr.Add(null);

            //Iterate an ArrayList
            foreach (var item in progLangsArr)
            {
                Console.WriteLine(item);
            }


            Console.ReadKey();
        }
    }
}

Output:

1
Billy
C
True
5.6

Let's see another example with object initializer syntax.

 
using System;
using System.Collections;

namespace ConsoleAppDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var progLangsArr = new ArrayList()
                {
                    1, "Billy", "C", true, 5.6, null
                };

            //Iterate an ArrayList
            foreach (var item in progLangsArr)
            {
                Console.WriteLine(item);
            }


            Console.ReadKey();
        }
    }
}
    

The result would be the same for both above examples.