public void WriteToBirthdayCsvFile(BirthdayPerson birthdayPerson) { var currentRecords = csvReaderWrapper.ReadFromBirthDayCsvFile(); currentRecords.Add(birthdayPerson); using (var stream = new StreamWriter(configurationWrapper.GetBirthdayCsvFilePath())) using (var writer = new CsvWriter(stream, new CultureInfo("EN"))) { writer.Configuration.HasHeaderRecord = true; writer.WriteRecords(currentRecords); } }