gistfile1.cs

    public class AdminController : Controller
    {
        private readonly IRpository<Category> repository;

        public AdminController(IRpository<Category> repository)
        {
            this.repository = repository;
        }

        public ViewResult Categories()
        {
            return View("Categories");
        }

        [HttpGet]
        public ActionResult CategoriesAdd()
        {
            return View("Categories");
        }

        [HttpPost]
        [ActionName("Categories")]
        public ActionResult CategoriesAdd(CategoriesAddViewModel viewModel)
        {
            return RedirectToAction("Categories");
        }
    }