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);