Martijn Muurman's Developers Blog Hello World!

Log4net is a great tool but it can be a bit tricky to get working. Adding a debug appender that logs to the visual studio output can be of great help. You can debug log4net by attaching the log4net DebugAppender:

Add a log4net app setting in your app.config file:

<appSettings>

  <!-- log4net configuration when running in debug mode. -->

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

</appSettings>

Add a debug appender in the log4net config:

<appendername="DebugAppender" type="log4net.Appender.DebugAppender">

   <immediateFlush value="true"/> 

   <layout type="log4net.Layout.SimpleLayout"/>

</appender>

Finally add the appender to the log4net config root:

<root>
   <level value="ALL"/>
   <appender-ref ref="DebugAppender"/>
</root>