using System;

​

public class Program

{

    public static void Main()

    {

        var emails = new[]{"prettyandsimple@example.com", "very.common@example.com", "disposable.style.email.with+symbol@example.com", "other.email-with-dash@example.com", "fully-qualified-domain@example.com", "user.name+tag+sorting@example.com", "x@example.com", "\"very.unusual.@.unusual.com\"@example.com", "\"very.(),:;<>[]\\\".VERY.\\\"very@\\\\ \\\"very\\\".unusual\"@strange.example.com", "example-indeed@strange-example.com", "admin@mailserver1", "#!$%&'*+-/=?^_`{}|~@example.org", "\"()<>[]:,;@\\\\\\\"!#$%&'-/=?^_`{}| ~.a\"@example.org", "\" \"@example.org", "example@s.solutions", "user@localserver", "user@[2001:DB8::1]", "john..doe@example.com", "example@localhost", "john.doe@example..com", "1234567890123456789012345678901234567890123456789012345678901234+x@example.com", "Abc.example.com", "A@b@c@example.com", "a\"b(c)d,e:f;g<h>i[j\\k]l@example.com", "just\"not\"right@example.com", "this is\"not\\allowed@example.com", "this\\ still\\\"not\\\\allowed@example.com"};

        foreach (var mail in emails)

        {

            try

            {

                var adress = new System.Net.Mail.MailAddress(mail);

                Console.WriteLine("Valid: true; Email: {0}", mail);

            }

            catch (Exception e)

            {

                Console.WriteLine("Valid: false; Email: {0}", mail);

            }

        }

    }

}