直接在文件夹地址栏输入
%userprofile%\documents\iisexpress\config\applicationhost.config
会打开上边的配置文件
将
<siteDefaults>
<logFile logFormat="W3C" directory="%IIS_USER_HOME%\Logs" />
<traceFailedRequestsLogging directory="%IIS_USER_HOME%\TraceLogFiles" enabled="true" maxLogFileSizeKB="1024" />
</siteDefaults>
<applicationDefaults applicationPool="Clr4IntegratedAppPool" />
<virtualDirectoryDefaults allowSubDirConfig="true" />
改为
<siteDefaults>
<logFile logFormat="W3C" directory="%IIS_USER_HOME%\Logs" />
<traceFailedRequestsLogging directory="%IIS_USER_HOME%\TraceLogFiles" enabled="true" maxLogFileSizeKB="1024" />
</siteDefaults>
<applicationDefaults applicationPool="Clr4ClassicAppPool" />
<virtualDirectoryDefaults allowSubDirConfig="true" />
在VS2013中强制IIS Express应用程序池使用经典模式
原文：http://www.cnblogs.com/iiwen/p/4761383.html