一、代码调用方式：
public static readonly Logger Logger = LogManager.GetCurrentClassLogger();
Logger .Trace("trace log message");
Logger .Debug("debug log message");
Logger .Info("info log message");
Logger .Warn("warn log message");
Logger .Error("error log message");
Logger .Fatal("fatal log message");
二、NLog配置文件，NLog.config
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="file" xsi:type="File" fileName="${basedir}/Logs/${shortdate}.log"
layout="${date:format=yyyy-MM-dd HH\:mm\:ss} : ${message}" />
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="file" />
</rules>
</nlog>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="file" xsi:type="File" fileName="${basedir}/Logs/${shortdate}.log"
layout="${date:format=yyyy-MM-dd HH\:mm\:ss} : ${message}" />
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="file" />
</rules>
</nlog>