<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>

   <nhibernate>
   <add key="hibernate.show_sql" value="false"/>
   <add key="hibernate.use_reflection_optimizer" value="false"/>
   <add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider"/>
   <add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2000Dialect"/>
   <add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver"/>
   <add key="hibernate.connection.connection_string" value="..."/>
   
   </nhibernate>
   
   <!-- This section contains the log4net configuration settings -->
   <log4net debug="false">

      <!-- Define some output appenders -->
      <!-- <appender name="trace" type="log4net.Appender.TraceAppender, log4net">
         <layout type="log4net.Layout.PatternLayout,log4net">
            <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &amp;lt;%P{user}&amp;gt; - %m%n" />
         </layout>
      </appender>

      <appender name="console" type="log4net.Appender.ConsoleAppender, log4net">
         <layout type="log4net.Layout.PatternLayout,log4net">
            <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &amp;lt;%P{user}&amp;gt; - %m%n" />
         </layout>
      </appender> -->

      <appender name="rollingFile" type="log4net.Appender.RollingFileAppender,log4net" >
         
         <param name="File" value="log.txt" />
         <param name="AppendToFile" value="true" />
         <param name="RollingStyle" value="Date" />
         <param name="DatePattern" value="yyyy.MM.dd" />
         <param name="StaticLogFileName" value="true" />

         <layout type="log4net.Layout.PatternLayout,log4net">
            <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &amp;lt;%X{user}&amp;gt; - %m%n" />
         </layout>
      </appender>

      <!-- Setup the root category, add the appenders and set the default priority -->
      
      <root>
         <priority value="INFO" />
         <appender-ref ref="rollingFile" />
      </root>
   </log4net>
   
</configuration>

using System;
using NHibernate;
using NHibernate.Cfg;
using NHibernate.Expression;
using System.Configuration;
using System.Collections;
// Import log4net classes.
using log4net;
using log4net.Config;

namespace Common.Data
{

   public class DataFactory:IDisposable {
                public DataFactory() {
                        // configure log4net
                        log4net.Config.XmlConfigurator.Configure();
                        // do the rest of initialization
                }
        }
}

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net, Version=1.2.9.0, Culture=neutral, PublicKeyToken=b32731d11ce58905" />