/// <summary>
        /// 职责链模式
        /// </summary>
        static void ChainOfResponsibility()
        {
            Console.WriteLine($"职责链模式{Environment.NewLine}-------------------------------------------");

            ILoggerHandler infoLogger  = new InfoLogger();
            ILoggerHandler debugLogger = new DebugLogger();
            ILoggerHandler warnLogger  = new WarnLogger();
            ILoggerHandler errorLogger = new ErrorLogger();

            infoLogger.Successor  = debugLogger;
            debugLogger.Successor = errorLogger;
            //errorLogger.Successor = warnLogger;

            infoLogger.Record("AAAAAAAAAAAA", LogLevelEmun.INFO);
            infoLogger.Record("BBBBBBBBBBBB", LogLevelEmun.DEBUG);
            infoLogger.Record("CCCCCCCCCCCC", LogLevelEmun.WARN);
            infoLogger.Record("DDDDDDDDDDDD", LogLevelEmun.ERROR);

            Console.ReadKey();
        }