public static ExpenseOrder ChooseOrder(Database.Database db) { if (db is null) { throw new ArgumentNullException(nameof(db)); } ExpenseOrder[] orders = db.GetOrders().OrderBy(x => x.OrderDate.ToFileTimeUtc()).ToArray(); Console.Clear(); const int numberPerPage = 5; int numberOfPages = orders.Length / numberPerPage; int currentPageIndex = 0; ExpenseOrder retVal = null; while (retVal == null) { if (currentPageIndex < 0) { currentPageIndex = 0; } if (currentPageIndex > numberOfPages) { currentPageIndex = numberOfPages; } Console.Clear(); ExpenseOrder[] currentPage = orders.Skip(currentPageIndex * numberPerPage).Take(numberPerPage).ToArray(); Console.WriteLine($"Displaying {currentPage.Length} of {orders.Length} orders."); for (int i = 0; i < currentPage.Length; i++) { ExpenseOrder order = currentPage[i]; Console.WriteLine($"{i + 1} : Order from {order.OrderDate.ToShortDateString()}"); } string resp = ConsoleUtilities.AskUser("(n)ext page, (p)rev page, (q)uit, or press a number to select an order."); if (resp == "n") { currentPageIndex++; } else if (resp == "p") { currentPageIndex--; } else if (resp == "q") { return(null); } else if (int.TryParse(resp, out int selectedItemIndex) && selectedItemIndex > 0 && selectedItemIndex <= currentPage.Length) { return(currentPage.ToArray()[selectedItemIndex - 1]); } } return(null); }