include name space "using System.Net.Mail;"
make function say sendmail in that,
sendmail()
{
// Details of SMTP server.
SmtpClient MailObj= new SmtpClient(SMTP_Server);
//Define USER ID and Password for SMTP Server Account
NetworkCredential cred = new NetworkCredential(SMTP_Authentication_User, SMTP_Authentication_Password);
//Assign that Credentials to Mail Object
MailObj.Credentials = cred;
//Define the email details as below.
//Note that multiple email address for to can be given by "," sign
MailObj.Send(from, to, subject, body);
}
