MAIL ET PIECE JOINTE

publicvoid SendMail(string from_mail, string To_Mail, string Mail_Title, string Message_Body,string piece_jointe)
{
        MailMessage myMail = new MailMessage();
        myMail.From = from_mail;
        myMail.To = To_Mail;
        myMail.Subject = Mail_Title;
        myMail.Priority = MailPriority.Normal;
        myMail.BodyFormat = MailFormat.Html;
        myMail.Body = Message_Body;
if(piece_jointe != "")
{
            MailAttachment myAttachment = new MailAttachment(piece_jointe);
            myMail.Attachments.Add(myAttachment);
}
        SmtpMail.SmtpServer = ConfigurationSettings.AppSettings["smtphost"];
        SmtpMail.Send(myMail);
}