method for Sending email through Gmail SMTP server with C#

First you have to write the following code in web.config file:

 <appSettings>

  <add key="SmtpServer" value="smtp.gmail.com"/>

  <add key="smtpserverport" value="587"/>

  <add key="FromId" value="xyz@gmail.com"/>

</appSettings>

The following Method will show an idea to send a mail through smpt server...

public void mailsend(string mailId, string subject, string body)

    {

        string smtpServer = ConfigurationManager.AppSettings["SmtpServer"].ToString();

        int smtpserverport = Convert.ToInt32(ConfigurationManager.AppSettings["smtpserverport"]);

        MailMessage mailMsg = new MailMessage();

        mailMsg.From = new System.Net.Mail.MailAddress(ConfigurationManager.AppSettings["FromId"], "HIHL-1056", System.Text.Encoding.UTF8);

        mailMsg.To.Add(mailId);

        mailMsg.Subject = subject;

        mailMsg.Body = body;

        mailMsg.BodyEncoding = System.Text.Encoding.UTF8;

        mailMsg.IsBodyHtml = true;

        mailMsg.Priority = System.Net.Mail.MailPriority.High;

        //The SMTP requires Authentication so the credentials has to be sent

        System.Net.NetworkCredential mailAuthentication = new System.Net.NetworkCredential("xyz@gmail.com", "password");

        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();

        client.Port = smtpserverport;

        client.Host = smtpServer;

        client.EnableSsl = true;

        client.UseDefaultCredentials = false;

        client.Credentials = mailAuthentication;

        object userState = mailMsg;

        client.Send(mailMsg);

    }