Sending Mail whit attachment

private void SendMailWithAttachment() {       string mail_from = "your account";       string mail_to = "whatever@something";       string mail_smtp_server = "smtp.someserver";      MailMessage message = new MailMessage();       MailAddress sender = new MailAddress(mail_from);       message.From = sender;       message.Subject = "Some text";       message.Body = "Massage";                  // attachment      FileStream fs = File.OpenRead("destination of the file");       byte[] cv = new byte[fs.Length];       fs.Read(cv, 0, cv.Length);       MemoryStream ms = new MemoryStream(cv);       Attachment attach = new Attachment(ms, "filename");       message.Attachments.Add(attach);       message.To.Add(mail_to);       SmtpClient smtp = new SmtpClient(mail_smtp_server);       smtp.Send(message); }