.net核心依赖注入“IMyService”是在给定上下文中无效的类型

所以我使用DI在控制器中注入了服务。

Startup.cs 我犯了个错误 IMyService' is a type which is not valid in a given context .

这是我的密码:

namespace MyDemoApp.API
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddScoped(IProductService, ProductService);
        }
    }
}

ProductService

namespace MyDemoApp.Services
{
    public class ProductService : IProductService
    {
        private readonly HttpClient _HttpClient;

        public ProductService(HttpClient HttpClient)
        {
            _HttpClient = HttpClient;
        }
        public async Task<string> RequestProductUrlFromAnotherAPI(CancellationToken cancellationToken)
        {
            var prodUrl = "https://......";
            var response = await _HttpClient.Get<ProductDto>(prodUrl, cancellationToken);
             
            if(response!= null && response.Success && response.Data != null && !string.IsNullOrWhiteSpace(response.Data))
            {
                return response.Data;
            }
            else
            {
                throw new ArgumentException("Data is not retrieved.");
            }
        }
    }
}