using System;

​

/*

    collections directive

*/

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        /*

            'List' declaration syntax:

            'List<type> a = new List<type>();'

            for the 'names' list, 'type' is 'string'

        */

        List<string> names = new List<string>();

        /*

            new list members are added with the 'Add' method

            the method accepts a string as argument

        */

        names.Add("Vitruvius");

        names.Add("Alberti");

        names.Add("Brunelleschi");

        names.Add("Palladio");

        names.Add("Palladio"); // lists may include duplicates

        names.Add("Palladio");

        /*

            access list members by index, like arrays

            the 'Count' field keeps track of the number of list members

            like arrays, list indices start at 0

        */

        names[names.Count - 2] = "Borromini";

        /*

            'LastIndexOf' retrieves the index of the last occurrence of a search string

        */

        names[names.LastIndexOf("Palladio")] = "Pisano";

        /*

            'foreach' is convenient way to iterate over members in a collection

        */

        foreach (string name in names)

        {

            Console.WriteLine(name);

        }

    }

}