public IHttpActionResult PutPerson(int id, Person person)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != person.Id)
            {
                return BadRequest();
            }

            db.Entry(person).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!PersonExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return Ok(person);
        }
        public IHttpActionResult PostPerson(Person person)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            db.People.Add(person);
            db.SaveChanges();

            return Ok(person);
        }