<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>
  <log4net>
    <root>
      <level value="ALL" />
    </root>
    <logger name="Log.All">
      <level value="INFO" />
      <appender-ref ref="Log.AllAppender" />
      <appender-ref ref="udpAppender" />
    </logger>
    <appender name="Log.AllAppender" type="log4net.Appender.RollingFileAppender,log4net">
      <param name="File" value="Logs\\" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Composite" />
      <param name="MaxSizeRollBackups" value="-1" />
      <param name="MaximumFileSize" value="20MB" />
      <param name="DatePattern" value="yyyyMM\\yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%m%n" />
      </layout>
    </appender>
    <appender name="udpAppender" type="log4net.Appender.UdpAppender">
      <remoteAddress value="10.255.4.12" />
      <remotePort value=" />
      <encoding value="utf-8"/>
      <!--输出详细内容-->
      <!--<layout type="log4net.Layout.XmlLayout">
        <locationInfo value="true" />
      </layout>-->
      <!--直接输出消息-->
      <layout type="log4net.Layout.PatternLayout, log4net">
        <conversionPattern value="%m" />
      </layout>
    </appender>
  </log4net>
</configuration>

FileInfo fi = new FileInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log4net.config"));
            XmlConfigurator.ConfigureAndWatch(fi);
            log4net.GlobalContext.Properties["LogAppName"] = "plutus";
            ILog LogAll = LogManager.GetLogger("Log.All");
            LogAll.Info("hello,test"+DateTime.Now.ToString());

Console.WriteLine("start listerning...");
            IPEndPoint ip = );
            UdpClient client = );
            while(true)
            {
                byte[] buffer = client.Receive(ref ip);
                string data = Encoding.Default.GetString(buffer);
                Console.WriteLine(data);
            }

<log4net:" domain="UnitTestAdapter: Running test" identity="admin-PC\admin" username="admin-PC\admin">
<log4net:message>hello,test2016// ::</log4net:message>
<log4net:properties>
<log4net:data name="log4net:Identity" value="admin-PC\admin" />
<log4net:data name="LogAppName" value="plutus" />
<log4net:data name="log4net:UserName" value="admin-PC\admin" />
<log4net:data name="log4net:HostName" value="admin-PC" />
</log4net:properties>
<log4net:locationInfo " />
</log4net:event>