code for sending mail

protected void SendMail()
  {
      // Gmail Address from where you send the mail
      var fromAddress = "google@gmail.com";
      // any address where the email will be sending
      var toAddress = "info@gmail.com";
      //Password of your gmail address
      const string fromPassword = "123456789";
      // Passing the values and make a email formate to display
      string subject = TextBox3.Text.ToString();
      string body = "From: " + txtname.Text + "\n";
      body += "Email: " + txtemail.Text + "\n";
      body += "Mobile: " + txtsubject.Text + "\n";
      body += "Message: \n" + txtmsg.Text + "\n";
      // smtp settings
      var smtp = new System.Net.Mail.SmtpClient();
      {
          smtp.Host = "smtp.gmail.com";
          smtp.Port = 587;
          smtp.EnableSsl = true;
          smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
          smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
          smtp.Timeout = 20000;
      }
      // Passing values to smtp object
      smtp.Send(fromAddress, toAddress, subject, body);
  }