In .net we have special namespace called System.Net.Mail. It contains classes used to send electronic mail to a Simple Mail Transfer Protocol (SMTP) server for delivery.

There are three main classes under this namespace.
MailMessage: This class represents the content of a mail message.
SmtpClient: This helps us to transmit emails to the SMTP host (Server) that we specify
Attachment: We all know what is attachment is, this class helps us to create mail attachments.

There are many methods and properties under these three classes.
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In below post, I will be explaining you a simple and basic methods which we can use to send mails. Of-course later on if you want you can add some more advanced features to it.

1. We have to import below namespace first.

2. Create an object of SmtpClient class