WebApi HttpMsgHanler的执行顺序

原来忘记在哪个大牛的博客上看到的，说添加顺序与执行顺序是相反的，事实在下边：直接上代码：

//STEP10，不论如何先记录下来请求信息
            if (msgHandlerSettings.LoggingHandlerConfig.Enable)
            {
                config.MessageHandlers.Add(new LoggingHandler(
                    _CreateInstance(msgHandlerSettings.LoggingHandlerConfig.LoggingRepositoryType) as ILoggingRepository));
            }

            //STEP11，检查数据在传输过程中是否被篡改
            if (msgHandlerSettings.SignHandlerConfig.Enable)
            {
                config.MessageHandlers.Add(new SignHandler());
            }

            //STEP12，请求数据转化成标准JSON格式
            if (msgHandlerSettings.ContentParserHandlerConfig.Enable)
            {
                config.MessageHandlers.Add(new ContentParserHandler(
                     _CreateInstance(msgHandlerSettings.ContentParserHandlerConfig.ContentParserType) as IContentParser));
            }

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