code for sending simple mail in .net

first of add the two namespaces i.e are folowing.

using System.Net;
using System.Net.Mail;
///////on send button click
{

SmtpClient smtpClient = new SmtpClient();
MailMessage message = new MailMessage();
try
{
MailAddress fromAddress = new
MailAddress("mithilesh25@gmail.com", "chandan");

smtpClient.Host = "smtp.gmail.com";
smtpClient.Port = 587;
smtpClient.EnableSsl = false;
smtpClient.Credentials = new
NetworkCredential("mithilesh25@gmail.com","chandan") ;





message.From = fromAddress;
message.To.Add("mithilesh25@gmail.com");
message.Subject = "Feedback";

message.IsBodyHtml = false;
message.Body = "Body";
smtpClient.Send(message);

// = "Mail Sent Successfully";
}
catch(Exception ex)
{
// = "Not Mail Sent Successfully";
Response.Write(ex.Message);
}
}