using System;

using System.Net.Mail;

public class Program

{

    public static void Main()

    {

        var mac = new MailAddressCollection();

        mac.Add(new MailAddress("test1@example.com","Test 1"));

        mac.Add(new MailAddress("test2@example.com"));

        mac.Add(new MailAddress("test3@example.com", "Test 3"));

        Console.WriteLine(mac.ToString());

    }

}