the program isn't run and i have not idea what problem

[moshesade]

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

namespace ConsoleApplication15
{
class Program
{
static void Main(string[] args)
{
MailMessage message = new MailMessage("@gmail.com", "@e4d.co.il", "test", "111");
message.To += "; ";
message.Attachments.Add(new Attachment("c:\\"));
SmtpClient sc = new SmtpClient("smtp.gmail.com",587);
sc.DeliveryMethod = SmtpDeliveryMethod.Network;
sc.UseDefaultCredentials = false;
sc.EnableSsl = true;
sc.Credentials = new NetworkCredential("jpodemsky", "");
sc.Send(message);
}
}
}
this code that my guide send me i change the parameter at the mail message and i write my username and my password and last time this work but i have a problem
this mail need send email for me that subject is test and content is 111
thank you