How to send emails through Asp.Net?

protected void Button1_Click(object sender, EventArgs e)
{
MailMessage mail = new MailMessage();
mail.To.Add("v.rajesh4ever@gmail.com");
mail.To.Add("abc@yahoo.com");
mail.From = new MailAddress("jainamit.agra@gmail.com");
mail.Subject = "Email using Gmail";

string Body = "Hi, this mail is to test sending mail"+
"using Gmail in ASP.NET";
mail.Body = Body;

mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
smtp.Credentials = new System.Net.NetworkCredential
("xyz@gmail.com","pwd");
//Or your Smtp Email ID and Password
smtp.EnableSsl = true;
smtp.Send(mail);

}