private void Parse(TextReader reader)
    {
        StringBuilder   scope   = new StringBuilder();
        IProcessContext context = null;     // create your context here.
        string          line    = reader.ReadLine();

        while (line != null)
        {
            IMyHandler handler = null;
            if (!_handlers.TryGetValue(line[0], out handler))
            {
                handler = _defaultHandler;
            }
            handler.Process(context, line);
            line = reader.ReadLine();
        }
    }