<?xml version="1.0" encoding="utf-8" ?>
<configuration>
 <configSections>
 <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
 </configSections>
 <log4net>
 <root>
 <level value="ALL" />
 <appender-ref ref="SysAppender" />
 </root>
 <logger name="WebLogger">
 <level value="DEBUG" />
 </logger>
 <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net">
 <!--<param name="File" value="App_Data/" />-->
 <param name="File" value="C:\\TestWeb\\Debug\\Error\\" />
 <param name="AppendToFile" value="true" />
 <param name="RollingStyle" value="Date" />
 <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
 <param name="StaticLogFileName" value="false" />
 <layout type="log4net.Layout.PatternLayout,log4net">
 <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
 <param name="Header" value=" ----------------------header--------------------------&#xD;&#xA;" />
 <param name="Footer" value=" ----------------------footer--------------------------&#xD;&#xA;" />
 </layout>
 </appender>
 <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
 <layout type="log4net.Layout.PatternLayout,log4net">
 <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
 </layout>
 </appender>
 </log4net>
 <startup> 
 <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
 </startup>
</configuration>

static void Main(string[] args)
 {
 //log4net日志
 log4net.ILog logInfo = log4net.LogManager.GetLogger("loginfo");
 logInfo.Info("測試日志寫入");
 }