using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

​

        string[] list_of_emails = new string[4] { "email1@mail.com", "email2@mail.com", "email3@mail.com", "email4@mail.com" };

​

        var mails = list_of_emails.ToList().Select(x => new System.Net.Mail.MailAddress(x));

        foreach(var address in mails)

        {

            Console.WriteLine(address.Address);

        }

    }

}