1. design class 2. main_function class 3. function class(timer) ex : 1. timer using System; using System.Timers; namespace Timer1 { internal class B_Timer { Timer tm2; int ss = 0; int mm = 0; int hh = 0; string var = "- - - - - -"; public void Init(int interval) { tm2 = new Timer(); tm2.Interval = interval; tm2.Elapsed += OnTimedEvent; } private void OnTimedEvent(Object source, ElapsedEventArgs ..