public void Add_new_transaction_to_cred_card3(DateTime new_date, double new_amount, string new_description) { const int dateColumn = 1; const int amountColumn = 2; const int descriptionColumn = 4; var cell_values = new Dictionary <int, object>() { { dateColumn, new_date.ToOADate() }, { amountColumn, new_amount }, { descriptionColumn, new_description } }; _spreadsheet_io.Append_new_row(MainSheetNames.Cred_card3, cell_values); }