static public void RemoveTimer(Timer2 timer)
 {
     if (timers.Contains(timer))
     {
         timers.Remove(timer);
     }
 }
 static public void AddTimer(Timer2 timer)
 {
     if (!timers.Contains(timer))
     {
         timers.Add(timer);
     }
     Console.WriteLine(timers.Count);
 }