Teste simples de geração de logs com log4net (http://logging.apache.org/log4net/)

Log4Net.app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net"
   type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
  <log4net>
    <appender name="ExceptionLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <file type="log4net.Util.PatternString">
        <conversionPattern value="teste.error.log" />
      </file>
      <appendToFile value="true" />
      <rollingStyle value="Date" />
      <datePattern value="-yyyy-MM-dd" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="Footer" value="------------------------------------------&#13;&#10;" />
        <conversionPattern value="%date [%thread] %level %logger - %message%newline" />
      </layout>
    </appender>
    <root>
      <level value="ALL" />
      <appender-ref ref="ExceptionLogFileAppender" />
    </root>
  </log4net>
</configuration>

Log4NetPoc.cs

using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
[assembly: log4net.Config.XmlConfigurator(Watch = true)]

namespace Log4NetPoc
{

    [TestClass]
    public class Log4NetTeste
    {
        [TestMethod]
        public void Gerar_apenas_com_excecao()
        {
            Log.Gerar<Log4NetTeste>(new Exception("Erro de teste em Log4Net"));
        }

        [TestMethod]
        public void Gerar_com_excecao_e_objeto_customizado()
        {
            Log.Gerar<Log4NetTeste>(new {mensagem="isso é um teste"}, new Exception("Erro de teste em Log4Net"));
        }
    }

    public static class Log
    {
        public static void Gerar<T>(object mensagem, Exception exception)
        {
            log4net.ILog log = log4net.LogManager.GetLogger(typeof(T));
            log.Error(mensagem, exception);
        }

        public static void Gerar<T>(Exception exception)
        {
            Gerar<T>(null, exception);
        }
    }
}