<configSections>
     <section name="log4net"             type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />

</configSections>

<log4net>

 <appender name="rollingFile" type="log4net.Appender.FileAppender,log4net" >
      <param name="File"       value="D:\\log.txt" />
      <param name="AppendToFile"  value="true" />
      <param name="RollingStyle" value="Date" />
      <param name="DatePattern"      value="yyyy.MM.dd" />
      <param name="StaticLogFileName"  value="true" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern"  value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>
    <root>     
      <appender-ref ref="rollingFile" />
    </root>
  </log4net>

执行程序

 try
            {
                throw new Exception("测试");
            }
            catch (System.Exception)
            {
                ILog log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
                //记录错误日志
                log.Error("error");
                //记录严重错误
                log.Fatal("fatal");
                //记录一般信息
                log.Info("info");
                //记录调试信息
                log.Debug("debug");
                //记录警告信息
                log.Warn("warn");
                Console.WriteLine("日志记录完毕。");
                Console.Read();
            }

没法写到文件里去，各位看看是很何处写错了？