public HomeController(IHostingEnvironment hostingEnvironment,
                       IUnitOfWork unitOfWork,
                       IRepository <DbEmail> dbEmailRepository,
                       ICsvReaderHandler reader,
                       ICsvEmailTransformer transformer)
 {
     _hostingEnvironment = hostingEnvironment;
     _unitOfWork         = unitOfWork;
     _dbEmailRepository  = dbEmailRepository;
     _reader             = reader;
     _transformer        = transformer;
 }
 public CsvReaderHandler(IRepository <DbEmail> session, ICsvEmailTransformer transformer)
 {
     _session     = session;
     _transformer = transformer;
 }