using System.Web.Mail;

  ... 

MailMessage message = new MailMessage ();

message.From = "webmaster@wintellect.com";

message.To = "luckywinner@somewhere.com";

message.Subject = "You Win!";

message.Body = "You have won the state lottery! To claim your prize, do a handstand on one hand and " +

  "count backwards from 1,000,000 to 1";

SmtpMail.Send (message);