Ejemplo de entrada en el web.config de configuración de log4net

<configuration>

...

<log4net>

<root>

<level value="ALL" />

<appender-ref ref="LogFileAppender" />

</root>

<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender,log4net">

<param name="File" value="C:\Log\SampleLog.txt" />

<param name="AppendToFile" value="true" />

<rollingStyle value="Size" />

<maxSizeRollBackups value="2" />

<maximumFileSize value="100KB" />

<staticLogFileName value="true" />

<datePattern value="yyyyMMdd" />

<layout type="log4net.Layout.PatternLayout">

<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />

</layout>

</appender>

</log4net>

</configuration>