automatic send email notification to the users in asp.net

u can also see the demo by opening the attachment

Hi please refer these links
http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient%28v=vs.110%29.aspx
http://csharp.net-informations.com/communications/csharp-smtp-mail.htm
http://www.codeproject.com/Articles/1684/Sending-Mail-Using-C-via-SMTP