AspNetCore unable to resolve service HttpContextAccessor [duplicate]

This question already has an answer here:

• InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHttpContextAccessor' 2 answers

I get this exception: InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.HttpContextAccessor' while attempting to activate 'Store.Northwind.MvcWebUI.Services.CartSessionService'.

I tried to dependency injection in startup file but didn't work

   public interface ICartSessionService
   {
       Cart GetCart();
       void SetCart(Cart cart);
   }

 public class CartSessionService:ICartSessionService
    {
        private HttpContextAccessor _httpContextAccessor;

        public CartSessionService(HttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }

        public Cart GetCart()
        {
          Cart cartToCheck=  _httpContextAccessor.HttpContext.Session.GetObject<Cart>("cart");
            if (cartToCheck==null)
            {
                _httpContextAccessor.HttpContext.Session.SetObject("cart",new Cart());
                cartToCheck = _httpContextAccessor.HttpContext.Session.GetObject<Cart>("cart");
            }

            return cartToCheck;
        }

        public void SetCart(Cart cart)
        {
            _httpContextAccessor.HttpContext.Session.SetObject("cart", new Cart());
        }
    }

       public void ConfigureServices(IServiceCollection services)
        {
            services.AddScoped<IProductService, ProductManager>();
            services.AddScoped<IProductDal, EfProductDal>();
            services.AddScoped<ICategoryService, CategoryManager>();
            services.AddScoped<ICategoryDal, EfCategoryDal>();
            services.AddSingleton<ICartSessionService, CartSessionService>();
            services.AddSingleton<ICartService, CartService>();
            services.AddSingleton<IHttpContextAccessor,HttpContextAccessor>();
            services.AddSession();
            services.AddDistributedMemoryCache();
            services.AddMvc();
        }