Some snippet below:

protected void Application_Start(object sender, EventArgs e)
{
XmlConfigurator.Configure();

log4net.Repository.ILoggerRepository repo = LogManager.GetRepository();
foreach (log4net.Appender.IAppender appender in repo.GetAppenders())
{
if (appender.Name.CompareTo(“RollingFileAppender”) == 0 && appender is log4net.Appender.RollingFileAppender)
{
var appndr = appender as log4net.Appender.RollingFileAppender;
string logPath = “MyApplication.log”;
appndr.File = logPath;
appndr.ActivateOptions();
}
}

logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

var configSource = new XmlConfigurationSource(ActiveRecordConfigStream);

Assembly assy = typeof([ParentAssembly]).Assembly;
ActiveRecordStarter.Initialize(configSource, assy.GetTypes());

logger.Info(“My Application Starting…”);
}