问asp.net core2路由问题

EN

app.UseMvc(routes => {
    routes.MapRoute(
            name: "pagination",
            template: "Products/Page{page}",
            defaults: new { controller = "Product", action = "List" });

        routes.MapRoute(
            name: "default",
            template: "{controller=Product}/{action=List}/{id?}");
});

public class ProductController : Controller {

    private IProductRepository repository;
    int PageSize = 4;

    public ProductController(IProductRepository repo) {
        repository = repo;
    }


    public ViewResult List(int page = 1) => View(
        new ProductsListViewModel {
            Products = repository.Products
                .OrderBy(x => x.Name)
                .Skip(PageSize * (page - 1))
                .Take(PageSize),
            PagingInfo = new PagingInfo {
                CurrentPage = page,
                ItemsPerPage = PageSize,
                TotalItems = repository.Products.Count()
            }
        }
    );
}