Simple SMTP E-Mail Sender in C#… Console application

I've been all over the Internet, as a beginner looking for examples for a simple e-mail sender program. I was looking for a simple structure to follow. Something I could look at & say to myself, "okay, I think I can understand that". Some examples I found were either outdated for today's .NET Network or there were over 100 lines of code & the article said, "Simple"… My way of giving back is to post this article. I've read some articles here, "The Code Project & MSDN". Both places were very helpful regarding information and help. For the old pros, I've been told I need to add some sort of garbage collection, which I will gladly do when I learn how. For now, it's working… And it is, "Simple".

using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Mail;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Mail To");
        MailAddress to = new MailAddress(Console.ReadLine());

        Console.WriteLine("Mail From");
        MailAddress from = new MailAddress(Console.ReadLine());

        MailMessage mail = new MailMessage(from, to);

        Console.WriteLine("Subject");
        mail.Subject = Console.ReadLine();

        Console.WriteLine("Your Message");
        mail.Body = Console.ReadLine();

        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 587;

        smtp.Credentials = new NetworkCredential(
            "username@domain.com", "password");
        smtp.EnableSsl = true;
        Console.WriteLine("Sending email...");
        smtp.Send(mail);
    }
}

As far as I know, you can use this with any SMTP server… More specifically the free ones, Gmail; Yahoo mail; AOL… I have not tested it on a private server…