public IActionResult Get(int id)
        {
            Dpg dpg = _context.Dpg.FirstOrDefault(d => d.DpgId == id);

            if (dpg == null)
            {
                return(NotFound());
            }
            return(Json(dpg));
        }
        public IActionResult Add(Dpg dpg)
        {
            if (dpg == null)
            {
                return(BadRequest("Empty body."));
            }

            _context.Dpg.Add(dpg);
            _context.SaveChanges();
            return(Ok(dpg));
        }