def METHOD_NAME(work_items):
    """
    Renders work items to CSV format, with the field names as a header row.
    :param work_items: The work items to include in the CSV output.
    :return: Work items rendered to a string in CSV format.
    """
    with StringIO() as csv_buffer:
        writer = csv.DictWriter(
            csv_buffer, ['description', 'guide', 'status', 'username', 'archived'],
            extrasaction='ignore')
        writer.writeheader()
        writer.writerows(work_items)
        csv_items = csv_buffer.getvalue()
    return csv_items