static void Main() { int selection; do { Console.WriteLine("1. Date Existance"); Console.WriteLine("2. HTML Replacer"); Console.WriteLine("3. Email Finder"); Console.WriteLine("4. Number Validator"); Console.WriteLine("5. Time Counter"); Console.WriteLine("0. Exit"); if (int.TryParse(Console.ReadLine(), out selection)) { switch (selection) { case 1: DateExistance.dateSearch(); break; case 2: HtmlReplacer.htmlReplace(); break; case 3: EmailFinder.emailSearch(); break; case 4: NumberValidator.Show(); break; case 5: TimeCounter.timeCounter(); break; } } } while (selection != 0); }