public IActionResult AddSize(Model.SizeModel model)
        {
            if (!ModelState.IsValid)
            {
                return(View());
            }

            sizes.Add(model);
            return(Redirect("/Menu/SizeList"));
        }
        public IActionResult EditSize(Model.SizeModel model)
        {
            if (!ModelState.IsValid)
            {
                return(View());
            }
            var index = sizes.FindIndex(x => x.Id == model.Id);

            sizes[index] = model;
            sizes.Add(model);
            return(View("SizeLIst", sizes));
        }