Assembly (reference)
System.Web
Using directive
using System.Web.Mail; (obsolete -> System.Net.Mail)
Code: send an Email
To be reviewed
See this: http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.aspx
MailMessage message = new MailMessage();
message.To = "Email recipients go here [; separated]";
message.From = "Sender Email goes here";
message.Subject = "Email title goes here";
message.Body = "Body text goes here";
SmtpMail.SmtpServer = "SMTP mail server name or IP goes here";
SmtpMail.Send(message);