NLog.xml

<?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"
      xmlns:elmahio="http://www.nlog-project.org/schemas/NLog.Targets.Elmah.Io.xsd"
      autoReload="true"
      internalLogLevel="Warn"
      internalLogFile="C:\temp\internal-nlog.txt">

  <extensions>
    <add assembly="Elmah.Io.NLog" />
  </extensions>

  <targets>
    <target name="elmahio" xsi:type="elmahio:elmah.io" apiKey="API_KEY" logId="LOG_ID" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" writeTo="elmahio" />
  </rules>
</nlog>