1 <?xml version="1.0" encoding="utf-8" ?> 2 <configuration> 3   <configSections> 4     <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/> 5   </configSections> 6   <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 7     <targets> 8       <target name="file" xsi:type="File" fileName="${shortdate}.txt" 9               layout="${date:format=HH\:mm\:ss}-${stacktrace}-${message}"/>10     </targets>11     <rules>12       <logger name="*" minlevel="Error" writeTo="file"/>13     </rules>14   </nlog>15 </configuration>

1 string message = "这是一个异常消息";2 NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();3 logger.Error(message);