How do I configure a RollingFileAppender to roll by date and size with log4net?

Question

I am configure log4net to use a composite RollingFileAppender so that the current file is always named logfile.log and all subsequent files are named

Answer 1

According to log4net RollingFileAppender source code:

protected string GetNextOutputFileName(string fileName)
{
    if (!m_staticLogFileName) 
    {
        fileName = fileName.Trim();

        if (m_rollDate)
        {
            fileName = fileName + m_now.ToString(m_datePattern, System.Globalization.DateTimeFormatInfo.InvariantInfo);
        }

        if (m_countDirection >= 0) 
        {
            fileName = fileName + '.' + m_curSizeRollBackups;
        }
    }

    return fileName;
}

So I'm guessing it's not possible to generate a log file with the name you need. I think it's something like logfileYYYY-MM-dd.n.log or similar.