Trace Activities with NLog

<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
  </configSections>
  
  <system.diagnostics>
    <trace autoflush="true" />
    <sources>
      <source name="TestSource" switchValue="All">
        <listeners>
          <add name="nlog" />
        </listeners>
      </source>
    </sources>
    <sharedListeners>
      <add name="nlog" type="LowLevelDesign.NLog.NLogTraceListener, LowLevelDesign.NLog.Ext" />
    </sharedListeners>
  </system.diagnostics>

  <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        internalLogToConsole="true" internalLogLevel="Info">
    <extensions>
      <add prefix="lld" assembly="LowLevelDesign.NLog.Ext" />
    </extensions>
    <targets>
      <target name="file" xsi:type="File" fileName="c:\logs\test.log" deleteOldFileOnStartup="true" layout="${longdate}|${event-context:item=RelatedActivityID}-&gt;${lld.activityid}|${processid}(${threadid})|${logger}|${uppercase:${level}}|${message}${onexception:|Exception occurred\:${exception:format=tostring}}" />
      <target name="console" xsi:type="ColoredConsole" layout="${longdate}|${lld.activityid}-&gt;${event-context:item=RelatedActivityID}|${processid}(${threadid})|${logger}|${uppercase:${level}}|${message}${onexception:|Exception occurred\:${exception:format=tostring}}" />
    </targets>
    <rules>
      <logger name="TestLogger" minlevel="Debug" writeTo="console" />
      <logger name="TestLogger" minlevel="Debug" writeTo="file" />
      <logger name="TestSource" minlevel="Debug" writeTo="console" />
      <logger name="TestSource" minlevel="Debug" writeTo="file" />
    </rules>
  </nlog>
</configuration>