[C#][Log4Net] 配置

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>

  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="Log\log.txt" />
      <appendToFile value="true" />
      <maxSizeRollBackups value="" />
      <maximumFileSize value="1024KB" />
      <rollingStyle value="Size" />
      <staticLogFileName value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
      </layout>
    </appender>
    <root>
      <!-- OFF FATAL ERROR WARN INFO DEBUG ALL -->
      <level value="ALL" />
      <appender-ref ref="RollingLogFileAppender" />
    </root>
  </log4net>
</configuration>

// 从配置文件读取 log4net 配置
log4net.Config.XmlConfigurator.Configure();
ILog logWriter = log4net.LogManager.GetLogger("Form1");
logWriter.Info("User Click!");