log4net项目中如何配置，以下详解

<?xml version="1.0" encoding="utf-8"?>
<log4net debug="false">

  <appender name="RootAppender" type="log4net.Appender.RollingFileAppender">
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <param name="Encoding" value="utf-8" />
    <staticLogFileName value="false" />
    <file value="E:\App\log\" />
    <datePattern value="LOG yyyyMMdd.LOG" />
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <staticLogFileName value="false" />
    <layout type="log4net.Layout.PatternLayout">
      <param name="ConversionPattern" value="记录时间：%date%n线程ID:[%thread]%n日志级别：%-5level%n记录类：%logger%n操作者ID：%property{Operator} 操作类型：%property{Action}%n当前机器名:%property%n当前机器名及登录用户：%username %n记录位置：%location%n消息描述：%property{Message}%n异常：%exception%n消息：%message%newline%n%n" />

    </layout>
  </appender>

  <root>
    <appender-ref ref="RootAppender" />
  </root>

</log4net>

    void Application_Start(object sender, EventArgs e)
    {
        // 在应用程序启动时运行的代码
        log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(Server.MapPath("log4net.config")));

    }

ILog log = LogManager.GetLogger("DataService.aspx");

log.Error("错误信息:" + ex.Message, ex);