using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // initial array

        var list = new List<string>();

        Console.WriteLine("[0] Capacity: {0}", list.Capacity);

        Console.WriteLine("[0] Count: {0}", list.Count);

        // add 4 items...

        for (int i = 0; i < 4; i++)

        {

            list.Add(i.ToString());

        }

​

        // check capacity & count

        Console.WriteLine("[1] Capacity: {0}", list.Capacity);

        Console.WriteLine("[1] Count: {0}", list.Count);

        // add another 4 items...

        for (int i = 0; i < 4; i++)

        {

            list.Add(i.ToString());

        }

​

        // check capacity & count

        Console.WriteLine("[2] Capacity: {0}", list.Capacity);

        Console.WriteLine("[2] Count: {0}", list.Count);

        // now, add only 1 item

        list.Add("hello");

        for (int i = 0; i < 6; i++)

        {

            list.Add(i.ToString());

        }

​

        // capacity & count might be different

        Console.WriteLine("[3] Capacity: {0}", list.Capacity);

        Console.WriteLine("[3] Count: {0}", list.Count);

        // then call TrimExcess() method...

        list.TrimExcess();

        // now, we know what capacity means

        Console.WriteLine("[4] Capacity: {0}", list.Capacity);

        Console.WriteLine("[4] Count: {0}", list.Count);

        // finally, we clear all items in the list

        list.Clear();

        // see what we get the capacity

        Console.WriteLine("[5] Capacity: {0}", list.Capacity);

        Console.WriteLine("[5] Count: {0}", list.Count);

    }

}