public static void ProceedToReturn() { Console.Clear(); Console.BackgroundColor = titleBackColor; Console.ForegroundColor = titleFontColor; Console.WriteLine("----RETURN BOOK----"); Console.ResetColor(); string username = string.Empty; while (true) { Console.Clear(); Console.BackgroundColor = titleBackColor; Console.ForegroundColor = titleFontColor; Console.WriteLine("| RETURN BOOK |"); Console.ResetColor(); Console.WriteLine(); Console.WriteLine(">Type your username"); username = Console.ReadLine(); if (!username.Trim().Equals(string.Empty)) { break; } } Reader user = rental.TryPickUserByName(username); if (user == null) { NoUserCase(); return; } int chosenBookIndex = 0; Console.Clear(); Console.BackgroundColor = menuBackColor; Console.ForegroundColor = menuFontColor; Console.WriteLine("| Esc - exit | Enter - choose| Up, Down arrows - navigate |"); Console.BackgroundColor = titleBackColor; Console.ForegroundColor = titleFontColor; Console.WriteLine("| RENT BOOK |"); Console.BackgroundColor = infoBackColor; Console.ForegroundColor = infoFontColor; Console.WriteLine(">User: "******">Your books: " : "You haven't rent any books yet"); if (books.Count != 0) { OptimisedListRender(chosenBookIndex, books); Guid bookid = Guid.Empty; while (true) { ConsoleKey key = Console.ReadKey().Key; if (key == ConsoleKey.UpArrow) { if (chosenBookIndex > 0) { chosenBookIndex--; } } if (key == ConsoleKey.DownArrow) { if (chosenBookIndex < books.Count - 1) { chosenBookIndex++; } } if (key == ConsoleKey.Enter) { break; } if (key == ConsoleKey.Escape) { return; } Console.Clear(); Console.BackgroundColor = menuBackColor; Console.ForegroundColor = menuFontColor; Console.WriteLine("| Esc - exit | Enter - choose| Up, Down arrows - navigate |"); Console.BackgroundColor = titleBackColor; Console.ForegroundColor = titleFontColor; Console.WriteLine("| RENT BOOK |"); Console.ResetColor(); Console.BackgroundColor = infoBackColor; Console.ForegroundColor = infoFontColor; Console.WriteLine(">User: "******">Available books: " : "No books available"); OptimisedListRender(chosenBookIndex, books); } bookid = books[chosenBookIndex].Id; Console.Clear(); Console.BackgroundColor = titleBackColor; Console.ForegroundColor = titleFontColor; Console.WriteLine("----RETURN BOOK----"); Console.BackgroundColor = infoBackColor; Console.ForegroundColor = infoFontColor; Console.WriteLine(">User: "******"----RETURN BOOK----"); Console.ResetColor(); Console.WriteLine("\n" + "No such book" + "\n" + "\n" + "Press any key to proceed..."); while (true) { if (Console.ReadKey() != null) { break; } } return; } Console.BackgroundColor = infoBackColor; Console.ForegroundColor = infoFontColor; Console.WriteLine(">Book: " + b.Name); Console.ResetColor(); Console.WriteLine(rental.TryReturnBook(b, user) ? "Returned successfully" : "Error, coludn't return"); } Console.WriteLine(); Console.WriteLine("Press any key to proceed..."); while (true) { if (Console.ReadKey() != null) { break; } } }