// GET: Paintings/Details/5
        public IActionResult Details(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            var painting = _paintingRepository.GetPaintingById(id);

            if (painting == null)
            {
                return(NotFound());
            }

            return(View(painting));
        }
        public IActionResult GetPaintingById(int itemId)
        {
            var painting = _repo.GetPaintingById(itemId);

            if (painting == null)
            {
                return(NotFound("No product with that Id was found"));
            }

            return(Ok(painting));
        }