// POST: api/Apen
        public ActionResult Post([FromBody] AapModel value)
        {
            HashSet <AapModel> apen = ApenProvider.Apen;

            value.Id = apen.Count;
            apen.Add(value);

            return(Created("https://localhost:44389", value));
        }
        public IActionResult Put(int id, [FromBody] AapModel value)
        {
            HashSet <AapModel> apen = ApenProvider.Apen;
            var aapToUpdate         = apen.FirstOrDefault(a => a.Id == id);

            aapToUpdate.Naam  = value.Naam;
            aapToUpdate.Soort = value.Soort;

            return(NoContent());
        }