Hands-On RESTful Web Services with ASP.NET Core 3

The service class interface

Since we have defined all the requests and response types needed by our service, we are now able to proceed by defining the IItemService interface and its implementation. As a first step, we can create a new Services folder in the Catalog.Domain project and proceed by defining the following IItemService interface:

using System.Collections.Generic;using System.Threading.Tasks;using Catalog.Domain.Requests.Item;using Catalog.Domain.Responses;namespace Catalog.Domain.Services{    public interface IItemService    {        Task<IEnumerable<ItemResponse>> GetItemsAsync();        Task<ItemResponse> GetItemAsync(GetItemRequest request);        Task<ItemResponse> AddItemAsync(AddItemRequest request); Task<ItemResponse> EditItemAsync(EditItemRequest ...