What is the Capacity property of an ArrayList class in C#?

The capacity property in ArrayList class gets or sets the number of elements that the ArrayList can contain.

Capacity is always greater than count. For capacity property −

arrList.Capacity

The default capacity is 4. If 5 elements are there, then its capacity is doubled and would be 8. This goes on.

You can try to run the following the code to implement Capacity property in C#. This also shows what we discussed above −

Example

 Live Demo

using System; using System.Collections; class Demo {    public static void Main() {       ArrayList arrList = new ArrayList();       arrList.Add(19);       arrList.Add(44);       arrList.Add(22);       ArrayList arrList2 = new ArrayList();       arrList2.Add(19);       arrList2.Add(44);       arrList2.Add(64);       arrList2.Add(32);       arrList2.Add(99);       Console.WriteLine("ArrayList1 - Total elements: "+arrList.Count);       Console.WriteLine("ArrayList1 - Capacity: "+arrList.Capacity);       Console.WriteLine("ArrayList2 - Total elements: "+arrList2.Count);       Console.WriteLine("ArrayList2 - Capacity: "+arrList2.Capacity);          } }

Output

ArrayList1 - Total elements: 3 ArrayList1 - Capacity: 4 ArrayList2 - Total elements: 5 ArrayList2 - Capacity: 8