How to display name instead of id in ASP.NET Core?

I test your project, and I have the idea like below, could you try the below code?\n\nRemove this line from your .csproj file, read this to know more:\n\n<Nullable>enable</Nullable>\nIn BookController:\n1.change the index action to add .Include to use the Include method to specify related data to be included in query results. :\n public async Task<IActionResult> Index()\n {\n return View(await _context.Books.Include(x=>x.Category).ToListAsync());\n }\n\n2.Change the post create action like your create action in CategoryController:\n public async Task<IActionResult> Create([Bind("Id,Title,ReleaseDate,Price,CategoryId")] Book model)\n {\n if (ModelState.IsValid)\n {\n _context.Add(model);\n await _context.SaveChangesAsync();\n return RedirectToAction(nameof(Index));\n }\n ViewData["CategoryId"] = new SelectList(_context.Set<Category>(), "CategoryId", "Name",model.CategoryId);\n return View(model);\n }\n\n3.result:\n",