private static void PerformAction(int num) { switch (num) { case 1: var rest1 = new GenerateQuick(Program.user1); rest1.PerformAction(1); break; case 2: var rest2 = new GenerateRandom(); rest2.ShowResult(); break; case 3: var rest3 = new GeneratePassword(); rest3.ShowResult(); break; case 4: ExitApp(); break; default: Thread.Sleep(2000); System.Console.WriteLine("You've given wrong number..."); break; } }