====== Log4net configuration ======

**web.config - add section:**
<code xml>
	<configSections>
                ...
 		<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
 	</configSections>

</code>

**web.config - log4net configuration:**
<code xml>
	<log4net debug="true">
		<appender name="FileAppender_Global" type="log4net.Appender.FileAppender">
			<file value="./Logs/Global.log"/>
			<appendToFile value="true"/>
			<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
			<maximumFileSize value="2MB"/>
			<layout type="log4net.Layout.PatternLayout">
				<ConversionPattern value="[%d] %-5p (%5rms) %-30.30c{1} %-25.25M - %m%n"/>
			</layout>
		</appender>
		<appender name="FileAppender_Error" type="log4net.Appender.FileAppender">
			<file value="./Logs/Error.log"/>
			<appendToFile value="true"/>
			<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
			<maximumFileSize value="2MB"/>
			<layout type="log4net.Layout.PatternLayout">
				<ConversionPattern value="[%d] %-5p (%5rms) %-30.30c{1} %-25.25M - %m%n"/>
			</layout>
		</appender>
		<logger name="Global">
			<level value="ALL"/>
			<appender-ref ref="FileAppender_Global"/>
		</logger>
		<logger name="Error">
			<level value="ALL"/>
			<appender-ref ref="FileAppender_Error"/>
		</logger>
		<root>
			<appender-ref ref="FileAppender_Global"/>
			<level value="ALL"/>"
		</root>
	</log4net>
</code>


**Tell application where is config - AssemblyInfo.cs:**
<code csharp>
        // log4net
        [assembly: log4net.Config.XmlConfigurator(ConfigFile = "Web.config", Watch = true)]
</code>

**How use it in code:**
<code csharp>

        public readonly ILog log_Global = LogManager.GetLogger("Global");
        public readonly ILog log_Error = LogManager.GetLogger("Error");
        ...
        log_Global.Info("Application started.");
        ...
        try
        {
        ...
        }
        catch (Exception ex)
        {
            log_Error.Fatal("Fatal Error when ..." , ex);
        }




</code>

===== Debuging =====

**Allow internal debugging in appsettings**
<code>
  <appSettings>
    <add key="log4net.Internal.Debug" value="true"/>
  </appSettings>
</code>

**Add listener**
<code>
  <system.diagnostics>
    <trace autoflush="true">
      <listeners>
        <add
            name="textWriterTraceListener"
            type="System.Diagnostics.TextWriterTraceListener"
            initializeData="C:\temp\log4net.txt" />
      </listeners>
    </trace>
  </system.diagnostics>
</code

===== References =====
  * [[http://logging.apache.org/log4net/]]
  * [[http://www.codeproject.com/Articles/140911/log4net-Tutorial]]