public bool SendEmail(
            string pGmailEmail,\\you r gmail id
            string pGmailPassword,\\your gmail password
            string pTo,          \\tomail id
            string pSubject,  \\subject
            string pBody,      \\body text
            System.Web.Mail.MailFormat pFormat,
            string pAttachmentPath)
        {
            try
            {
                System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "smtp.gmail.com");

                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", "465");

                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", "2");


                // authenticate with the service.
                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");

                //Use 0 for anonymous
                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", pGmailEmail);

                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", pGmailPassword);

                myMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");

                myMail.From = pGmailEmail;
                myMail.To = pTo;
                myMail.Subject = pSubject;
                myMail.BodyFormat = pFormat;
                myMail.Body = pBody;
                if (pAttachmentPath.Trim() != "")
                {
                    MailAttachment MyAttachment =
                    new MailAttachment(pAttachmentPath);
                    myMail.Attachments.Add(MyAttachment);
                    myMail.Priority = System.Web.Mail.MailPriority.High;
                }

                System.Web.Mail.SmtpMail.SmtpServer = "smtp.gmail.com:465";
                System.Web.Mail.SmtpMail.Send(myMail);
                return true;
            }
            catch (Exception ex)
            {
                Console.Write(ex.Message);
                throw;
            }
        }