using System;

using System.Net.Mail;

public class Program

{

    public static void Main()

    {

        var addr1 = new MailAddress("foo@bar.com");

        var addr2 = new MailAddress("brad@mcmusa.equipment");

        var addr4 = new MailAddress("brad@rtrusa.equipment");

        var invalid = new MailAddress("aaaaaaaaaaaaaa");

    }

}