public IHttpActionResult PutChair(int id, Chair chair)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (chair == null)
            {
                return(BadRequest());
            }

            UpdateChair(chair, id);

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

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult PutFaculty(int id, Faculty faculty)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (faculty == null)
            {
                return(BadRequest());
            }

            UpdateFaculty(faculty, id);

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

            return(StatusCode(HttpStatusCode.NoContent));
        }