Cool, that worked.
For the poor soul, add the following to App.config:
...
<appender name="TraceAppender" type="log4net.Appender.TraceAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5level %logger - %message%newline" />
</layout>
</appender>
...
<system.diagnostics>
<trace autoflush="false" indentsize="3" />
</system.diagnostics>
...
<root>
<level value="DEBUG" />
...
<appender-ref ref="TraceAppender" />
</root>