/// <summary>
        /// 機(ji)構(gou)ＩＤ
        /// </summary>
        [DisplayName("機構ID")]
        public int AgentId { get; set; }
        /// <summary>
        /// 機構名(ming)稱
        /// </summary>
        [DisplayName("機構名稱")]
        [MaxLength(128)]
        public string AgentName { get; set; }
        /// <summary>
        /// 機(ji)構負責人
        /// </summary>
        [DisplayName("機構負(fu)責人")]
        [MaxLength(128)]
        public string AgentUser { get; set; }

   public class CreateUserEventValidator : AbstractValidator<CreateUserEvent>
    {
        public CreateUserEventValidator()
        {
            RuleFor(command => command.UserName).NotEmpty().Length(5, 20).WithMessage("用戶名升(sheng)序(xu)為5－20字符！");
            RuleFor(command => command.Email).NotEmpty().EmailAddress().WithMessage("不是(shi)有效的Email！");
            RuleFor(command => command.BirthDay).NotEmpty().Must(i => i < DateTime.Now).WithMessage("你的年紀太小了！");
        }
    }

   //驗(yan)證－裝飾器
   BusManager.Instance.Subscribe(new ValidatorDecorator<CreateUserEvent>(
                                 new UserEventHandler(),
                                 new CreateUserEventValidator()));
   //日志－裝飾(shi)器
   BusManager.Instance.Subscribe(new LoggerDecorator<CreateUserEvent>(new UserEventHandler()));
   BusManager.Instance.Publish(new CreateUserEvent { UserName = "占(zhan)占(zhan)大師5個(ge)字" });

    /// <summary>
    /// 驗證裝飾器
    /// </summary>
    /// <typeparam name="TEvent"></typeparam>
    [Serializable]
    public class ValidatorDecorator<TEvent>
       : IBusHandler<TEvent>
        where TEvent : IBusData
    {
        /// <summary>
        /// 要被裝飾的(de)處(chu)理程序
        /// </summary>
        private readonly IBusHandler<TEvent> _inner;
        /// <summary>
        /// 校驗裝(zhuang)飾器集合
        /// </summary>
        private readonly IValidator<TEvent>[] _validators;

        /// <summary>
        /// 初始化(hua)
        /// </summary>
        /// <param name="inner">要被裝飾(shi)的處理程(cheng)序</param>
        /// <param name="validators">裝飾器</param>
        public ValidatorDecorator(IBusHandler<TEvent> inner, params IValidator<TEvent>[] validators)
        {
            _inner = inner;
            _validators = validators;
        }
        public void Handle(TEvent evt)
        {
            var failures = _validators
                           .Select(v => v.Validate(evt))
                           .SelectMany(result => result.Errors)
                           .Where(error => error != null)
                           .ToList();

            if (failures.Any())
            {
                throw new ValidationException("實(shi)體校驗失(shi)敗", failures);
            }

            _inner.Handle(evt);
        }
    }