Send Mail

add-using System.Net.Mail;

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 MailMessage mail = new MailMessage();//object created
        //Setting From , To and CC

        mail.To.Add(Textboxemail.Text);
        mail.From = new MailAddress("from@gmail.com");
        mail.Subject = "thanks for Registartion";
        mail.Body = "Thanks for registration in test. Your Password is " + ":" + " " + Labelpass.Text;
        mail.IsBodyHtml = true;// it will convert msg format in html
        //smtp object

        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Credentials = new System.Net.NetworkCredential("email", "password");//email id & password
        smtp.EnableSsl = true;// server security licence will true then only mail will send
        smtp.Send(mail);