public override void Intercept(IEventPublishContext context)
 {
     (context.Event as TestEvent).Output += ("Before:TestEventInterceptor2Attibute");
     context.Proceed();
     (context.Event as TestEvent).Output += ("After:TestEventInterceptor2Attibute");
 }
 /// <summary>
 /// 拦截正在发布的事件。
 /// </summary>
 public abstract void Intercept(IEventPublishContext context);