How to send the email using C# with embeded HTML TABLE

string body = "You have received a status update from " + Session["name"].ToString() + ", Department : " + Session["deptt"].ToString() + "  ,with reference to Assignment ID: " + lblassno.Text + " /Task ID: " + taskid + ". Kindly login TMS on Intranet Portal to view the details.";
        body += "<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><span style="mso-bidi-font-style:normal;font-style: italic;font-size: small;">This is a System generated message,";
        body += "kindly do not reply to this.<o:p xmlns:o="#unknown"></o:p></span>";

MailMessage m = new MailMessage("senderid", To);
                m.Subject = Subject;
                m.Body = Body;
                m.IsBodyHtml = true;
                m.From = new MailAddress(From);

                m.To.Add(new MailAddress(To));
                SmtpClient smtp = new SmtpClient();
                smtp.Host = "mail.google.com";
              
                NetworkCredential authinfo = new NetworkCredential("seder@gmail.com", "pass123");
                smtp.UseDefaultCredentials = false;
                smtp.Credentials = authinfo;
                smtp.Send(m);