我创建了一个.NETCore 2.0MVC应用程序，并使用依赖注入和存储库模式将存储库注入我的控制器。但是，当我的UserService要注入UserController时，我收到一个错误：

InvalidOperationException：在尝试激活FFLEX.Services. User.UserService时，无法解析类型FFLEX.Services.Reposity.IGenericRepository'1[FFLEX.Core.ApplicationUser]'的服务。

通用存储库

public class GenericRepository<T> : IGenericRepository<T> where T : class {
    protected ApplicationDbContext _context;

    public GenericRepository(ApplicationDbContext context) {
        _context = context;
    }

    public IQueryable<T> GetAll() {
        return _context.Set<T>();
    }

    public virtual async Task<ICollection<T>> GetAllAsyn() {
        return await _context.Set<T>().ToListAsync();
    }
}

IUserService

public interface IUserService {
    Task<ICollection<ApplicationUser>> GetAllNonSuperAdminUsers();
}

用户服务

public class UserService : IUserService {
    protected readonly IGenericRepository<ApplicationUser> _repository;

    public UserService(IGenericRepository<ApplicationUser> repository) {
        repository = repository;
   }

    public async Task<ICollection<ApplicationUser>> GetAllNonSuperAdminUsers() {
        return await _repository.GetAllAsyn();
    }
}

用户控制器

public class UserController : Controller {
    private readonly IUserService _userService;

    public UserController(IUserService userService) {
        userService = userService;
    }

    public async Task<IActionResult> Index() {
        var test = await PrepareUserViewModel();
        return View(test);
    }

    public async Task<UserViewModel> PrepareUserViewModel() {
        UserViewModel vm = new UserViewModel();
        vm.UserCount = 1;
        vm.Subscribers = 1;
        vm.Guest = 1;
        vm.Users = await _userService.GetAllNonSuperAdminUsers();
        return vm;
    }
}

Startup. cs配置

public void ConfigureServices(IServiceCollection services) {
    services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(FFLEXConsts.ConnectionString));

    services.AddIdentity<ApplicationUser, IdentityRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

    // Add application services.
    services.AddTransient<IEmailSender, EmailSender>();
    //services.AddTransient<IUserService, UserService>();
    services.AddScoped<IUserService, UserService>();

    services.AddMvc();
}

我不确定我做错了什么。请帮我摆脱它，因为它似乎没有任何问题。