public CSVReaderWriter(IReader readerStream)
        {
            WriterStream = null;
            readerStream.ThrowIfNull("readerStream");

            ReaderStream = readerStream;
        }
        public void Import(IReader reader, IQuoteFormatter formatter)
        {
            reader.ThrowIfNull("reader");
            formatter.ThrowIfNull("formatter");

            _formatter = formatter;
            DoImport(reader);
        }