private static void regex() { while (true) { Console.Clear(); Menu(); if (!int.TryParse(Console.ReadLine(), out int Mode)) { Console.WriteLine("Incorrect input. Try again:"); continue; } switch (Mode) { case 1: { Console.Clear(); DateExistence.reg(); Console.WriteLine("Press any key to continue"); Console.ReadLine(); break; } case 2: { Console.Clear(); HtmlReplacer.reg(); Console.WriteLine("Press any key to continue"); Console.ReadLine(); break; } case 3: { Console.Clear(); EmailFinder.reg(); Console.WriteLine("Press any key to continue"); Console.ReadLine(); break; } case 4: { Console.Clear(); NumberValidator.reg(); Console.WriteLine("Press any key to continue"); Console.ReadLine(); break; } case 5: { Console.Clear(); TimeCounter.reg(); Console.WriteLine("Press any key to continue"); Console.ReadLine(); break; } case 0: { return; } default: { Console.WriteLine("Wrong input."); break; } } if (Mode == 0) { break; } } }