log4net self logging

app.config

<configuration>
  <appSettings>
    <add key="log4net.Internal.Debug" value="true"/>
  </appSettings>
</configuration>

<system.diagnostics>
 <trace autoflush="true">
  <listeners>
   <add name="textWriterTraceListener"
        type="System.Diagnostics.TextWriterTraceListener"
        initializeData="C:\tmp\log4net.txt" />
  </listeners>
 </trace>
</system.diagnostics>