StackOverFlowException raised when this line such as "logDirectory = new DirectoryInfo(m_logFileDirectory);" was excuting

Question

StackOverFlowExceprion raised, when logDirectory = new DirectoryInfo(m_logFileDirectory); line was executing. How can I solve the problem? Please help me. This procedure writeLogToFile write a logMessge to File to logDirectory. It is part of Log write program.

    private void writeLogToFile(string logMessge)
    {
        DirectoryInfo logDirectory = null;
    
        try
        {
            Monitor.Enter(m_lock);
    
            logDirectory = new DirectoryInfo(m_logFileDirectory);
            if (!logDirectory.Exists)
            {
               logDirectory.Create();
            }
    
            if (m_streamWriter == null) newLogFile();
    
            if (m_logFileAutoSeperate && (m_streamWriter.BaseStream.Length > m_logFileSize * 1024))
            {
                 newLogFile();
                 m_streamWriter.WriteLine(logMessge);
            }
            else
            {
                m_streamWriter.WriteLine(logMessge);
            }
    
            // stream writer uses  internal buffer.
            // if directWriting option is true, the file will be write(flush) once.
    
            if (directWriting) m_streamWriter.Flush();
       }
       catch (StackOverflowException sofex)
       {
           AppExceptionHandler.writeException(sofex);
       }
       catch (AppException aex)
       {
           AppExceptionHandler.writeException(aex);
       }
       catch (Exception ex)
       {
           AppExceptionHandler.writeException(ex);
       }
       finally
       {
           Monitor.Exit(m_lock);
       }
    }

From the comments, this is what newLogFile looks like:

private void newLogFile() 
{
    try 
    { 
        Monitor.Enter(m_lock); 
        if (m_streamWriter != null) 
        { 
            endLogging(); 
            m_streamWriter.Flush(); 
            m_streamWriter.Close();
        }
        m_logFileNameSuffix = getLogFileNewSuffix();
        m_streamWriter = File.AppendText(getLogFileName());
        startLogging(); 
    }
}