log4net配置文件

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>

    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
  <log4net>
    <!--http://logging.apache.org/log4net/release/sdk/log4net.Layout.PatternLayout.html-->
    　<!--　这个配置文件定义了三种不同的Appender，分别是ADO.NET 记录到数据，ConsoleAppender 从控制台输出， FileAppender 日志信息文件输出。-->

    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender,log4net">
       <!--这里是普通操作日志配置-->
      <param name="File" value="App_Data/Info/" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Composite" />
      <param name="MaxSizeRollBackups" value="" />
      <param name="MaximumFileSize" value="1MB" />
      <param name="DatePattern" value="&quot;Los_&quot;yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="[%p %t] [%date{yyyy-MM-dd HH:mm:ss,fff}] %-5logger - %m%n"/>
      </layout>
      <!--Debug、Info、Warn、Error、FATAL-->
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="Debug" />
        <levelMax value="Info" />
      </filter>
    </appender>

    <appender name="RollingFileTracer" type="log4net.Appender.RollingFileAppender,log4net">
       <!--这里是异常日志配置-->
      <param name="File" value="App_Data/Error/" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Composite" />
      <param name="MaxSizeRollBackups" value="" />
      <param name="MaximumFileSize" value="1MB" />
      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="[%p %t] [%date{yyyy-MM-dd HH:mm:ss,fff}] %-5logger - %m%n"/>
      </layout>
      <!--Debug、Info、Warn、Error、FATAL-->
      <filter type="log4net.Filter.LevelRangeFilter">
        <levelMin value="Warn" />
        <levelMax value="FATAL" />
      </filter>
    </appender>
    <root>
      <level value="ALL"/>
      <appender-ref ref="RollingFile"/>
      <appender-ref ref="RollingFileTracer"/>
    </root>
  </log4net>
</configuration>

log4net.Config.XmlConfigurator.Configure();

ILog logger = LogManager.GetLogger(typeof(Program));

logger.Error(“”);