public IHttpActionResult Post([FromBody] AttendeesRegistrants attendees)
        {
            Random rand = new Random();

            attendees.Id = rand.Next(4, 1000);
            _attendeesList.Add(attendees);
            return(Ok());
        }
        public IHttpActionResult Put([FromBody] AttendeesRegistrants attendees)
        {
            var objToUpdate = _attendeesList.FirstOrDefault(x => x.Id == attendees.Id);

            if (objToUpdate != null)
            {
                objToUpdate.FirstName    = attendees.FirstName;
                objToUpdate.MidName      = attendees.MidName;
                objToUpdate.LastName     = attendees.LastName;
                objToUpdate.Age          = attendees.Age;
                objToUpdate.EmailAddress = attendees.EmailAddress;
            }
            return(Ok());
        }