Configuring log4net for specific classes or namespaces

Here is some sample xml that goes in the application config file.

<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
    ...
  </configSections>
  <log4net>
    <appender name="ConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
      <mapping>
        <level value="ERROR" />
        <foreColor value="Red, HighIntensity" />
      </mapping>
      <mapping>
        <level value="WARN" />
        <foreColor value="Yellow" />
      </mapping>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%utcdate [%t] %-5p [] - %m%n"/>
      </layout>
    </appender>
    <appender name="OutputDebugStringAppender" type="log4net.Appender.OutputDebugStringAppender">
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%utcdate [%t] %-5p %c [] - %m%n"/>
      </layout>
    </appender>
    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
      <file value="FilePath.txt" />
      <appendToFile value="true" />
      <maximumFileSize value="1000KB" />
      <maxSizeRollBackups value="20" />
      <param name="RollingStyle" value="Size" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%utcdate [%t] %-5p %c [] - %m%n" />
      </layout>
    </appender>
    <root>
      <level value="INFO"/>
      <appender-ref ref="RollingFile"/>
      <appender-ref ref="ConsoleAppender"/>
      <appender-ref ref="OutputDebugStringAppender"/>
    </root>
    <!--Level values are DEBUG, INFO, WARN, ERROR -->
    <!--Entries for "top level" server module classes, to allow tracing of method calls -->
    <logger name="Some.Name.Space.ClassA.">
      <level value="INFO"/>
    </logger>
    ...
    <!--Entries for namespaces, to allow full tracing inside modules -->
    <logger name="Some.Particular.Namespace">
      <level value="INFO"/>
    </logger>
    ...
    <!--Entries for certain individual classes -->
    <logger name="Some.Deep.Level.NameSpace.SpecificClass.">
      <level value="DEBUG"/>
    </logger>
    ...
  </log4net>
...  
</configuration>

Setting up Log4Net in the application config file.

Setting up log4net to use a rolling file appender and a trace appender

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net"
 type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net debug="false">
    <appender name="RollingFileAppender"
 type="log4net.Appender.RollingFileAppender">
      <file
 value="${ENVIROMENTALVARIABLENAME}\\MyApplicationName.exe.txt" />
      <appendToFile value="true" />
      <maximumFileSize value="100KB" />
      <maxSizeRollBackups value="5" />
      <param name="RollingStyle" value="Size" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] -
 %m%n" />
      </layout>
    </appender>
    <appender name="TraceAppender"
 type="log4net.Appender.TraceAppender">
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%d [%t] %-5p %c [%x] - %m%n" />
      </layout>
    </appender>
    <root>
      <priority value="ALL" />
      <appender-ref ref="RollingFileAppender" />
      <appender-ref ref="TraceAppender" />
    </root>
  </log4net>
</configuration>