问如何在.Net的存储库模式中使用Fluent验证？

EN

public class ActivitiesService : AbstractValidator<Activity>,IActivitiesService
    {
        private readonly DataContext _dataContext;

        public ActivitiesService(DataContext dataContext)
        {
            _dataContext = dataContext;

            RuleFor(x => x.Title).NotNull();
            RuleFor(x => x.Description).NotEmpty();
            RuleFor(x => x.Category).NotEmpty();
            RuleFor(x => x.Date).NotEmpty();
            RuleFor(x => x.City).NotEmpty();
            RuleFor(x => x.Venue).NotEmpty();
        }

       
        public async Task<AccountResult> CreateActivity(Activity activity)
        {
            var resultMessage = new AccountResult();
            _dataContext.Activities.Add(activity);
            await _dataContext.SaveChangesAsync();

            return resultMessage;

        }

       
    }

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<DataContext>(options => options.UseSqlServer(Configuration.GetConnectionString("PreactivitiesDBConnection")));

            services.AddCors(opt => {
                opt.AddPolicy("CorsPolicy", policy => {
                    policy.AllowAnyHeader().AllowAnyMethod().WithOrigins("http://localhost:3000");
                });
            });
            
            services.AddControllers().AddNewtonsoftJson(options =>
    options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
);

            services.AddScoped<IActivitiesService, ActivitiesService>();
            services.AddMediatR(typeof(List.Handler).Assembly);
            services.AddMvc(option => option.EnableEndpointRouting = false).AddFluentValidation(cfg => cfg.RegisterValidatorsFromAssemblyContaining<ActivitiesService>());

        }