using System.Net.Mail;
protected void Mailsend()
{
        string Message = "";
        try
        {
            //email setup
            string smtpHost = "";
            string smtpPort = "";
            MailMessage ObjMail = new MailMessage();
            SmtpClient ObjSmtpClient = new SmtpClient();
            System.Net.NetworkCredential BasicAuthenticationInfo = new System.Net.NetworkCredential();


                    //Mail settings
                    ObjMail.From = new MailAddress("from@sample.com");
                    ObjMail.To.Add("Recever@sample.com");
                    ObjMail.Subject = "sample";
                    Message = "sample"; 
                    ObjMail.Body = Message;
                    ObjMail.IsBodyHtml = true;

                    //SMTP settings
                    smtpHost = System.Configuration.ConfigurationSettings.AppSettings["smtpHost"].ToString();
                    smtpPort = System.Configuration.ConfigurationSettings.AppSettings["smtpPort"].ToString();
                    ObjSmtpClient = new SmtpClient(smtpHost, Convert.ToInt16(smtpPort));
                    ObjSmtpClient.UseDefaultCredentials = false;
                    BasicAuthenticationInfo = new System.Net.NetworkCredential("", "");
                    ObjSmtpClient.Credentials = BasicAuthenticationInfo;
                    ObjSmtpClient.Send(ObjMail);
                

            }
        }
        catch
        {

        }
}