Send Meeting Request in SharePoint

By using the below code, we can send the invite meeting request to any.

//To send Calder Meeting Event request
        private void sendMeetingRequest(DateTime startTime, DateTime endTime, string candidateEmail, string status, string location)
        {
            try
            {
                //create the credentials
                NetworkCredential cred = new NetworkCredential(ConfigurationManager.AppSettings["userName"], ConfigurationManager.AppSettings["password"]);

                //create the smtp client...these settings are for gmail
                SmtpClient sc = new SmtpClient(ConfigurationManager.AppSettings["SMPTPServerName"], (Convert.ToInt32(ConfigurationManager.AppSettings["portNo"])));
                sc.UseDefaultCredentials = false;
                sc.EnableSsl = true;

                //credentials (username, pass of sending account) assigned here
                sc.Credentials = cred;
                MailMessage msg = new MailMessage();
                msg.From = new MailAddress(ConfigurationManager.AppSettings["userName"], "FromMe");
                msg.To.Add(new MailAddress(candidateEmail, "From My  Portal"));
                msg.Subject = "Interview Schedueled";
                msg.Body = "Interview Scheduled. Get ready to face it.";
                //DateTime startTime = DateTime.UtcNow.AddDays(1);
                //DateTime endTime = DateTime.UtcNow.AddHours(25);
                StringBuilder str = new StringBuilder();
                str.AppendLine("BEGIN:VCALENDAR");
                str.AppendLine("PRODID:-//My Group");
                str.AppendLine("VERSION:2.0");
                str.AppendLine("METHOD:REQUEST");
                str.AppendLine("BEGIN:VEVENT");
                str.AppendLine(string.Format("DTSTART:{0:yyyyMMddTHHmmssZ}", startTime));
                str.AppendLine(string.Format("DTSTAMP:{0:yyyyMMddTHHmmssZ}", DateTime.UtcNow));
                str.AppendLine(string.Format("DTEND:{0:yyyyMMddTHHmmssZ}", endTime));
                string meetingLocation = "LOCATION: " + location;
                str.AppendLine(meetingLocation);
                str.AppendLine(string.Format("UID:{0}", Guid.NewGuid()));
                str.AppendLine(string.Format("DESCRIPTION:{0}", msg.Body));
                str.AppendLine(string.Format("X-ALT-DESC;FMTTYPE=text/html:{0}", msg.Body));
                str.AppendLine(string.Format("SUMMARY:{0}", msg.Subject));
                str.AppendLine(string.Format("ORGANIZER:MAILTO:{0}", msg.From.Address));

                str.AppendLine(string.Format("ATTENDEE;CN=\"{0}\";RSVP=TRUE:mailto:{1}", msg.To[0].DisplayName, msg.To[0].Address));

                str.AppendLine("BEGIN:VALARM");
                str.AppendLine("TRIGGER:-PT15M");
                str.AppendLine("ACTION:DISPLAY");
                str.AppendLine("DESCRIPTION:Reminder");
                str.AppendLine("END:VALARM");
                str.AppendLine("END:VEVENT");
                str.AppendLine("END:VCALENDAR");
                System.Net.Mime.ContentType ct = new System.Net.Mime.ContentType("text/calendar");
                ct.Parameters.Add("method", "REQUEST");
                AlternateView avCal = AlternateView.CreateAlternateViewFromString(str.ToString(), ct);
                msg.AlternateViews.Add(avCal);
                ServicePointManager.ServerCertificateValidationCallback = delegate(object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; };
                sc.Send(msg);
               
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex); 
                if(ex.InnerException!=null)
                    Console.WriteLine("InnerException is: {0}", ex.InnerException);

            }
        }