log4net.config

<?xml version="1.0"?>
<configuration>

  <configSections>
    <section name="log4net"
        type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>

  <log4net>
    <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
      <file value="trace.log"/>
      <!--Indicates whether the file should be appended to or overwritten.-->
      <appendToFile value="true"/>
      <!--Roll files based only on the size of the file-->
      <rollingStyle value="Size"/>
      <!--The maximum number of backup files that are kept before the oldest is erased.-->
      <maxSizeRollBackups value="10"/>
      <maximumFileSize value="500KB"/>
      <!--true if always should be logged to the same file, otherwise false.-->
      <staticLogFileName value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date|%-5level|%logger|%message%newline%exception"/>
      </layout>
    </appender>

    <!-- Setup the root category, add the appenders and set the default level. -->
    <root>
      <level value="ALL"/>  <!-- default: INFO - extensive: ALL -->
      <appender-ref ref="RollingFileAppender"/>
    </root>

  </log4net>

</configuration>