Optimize GC in Unity5.4.4

[Sheh伟伟]

I found 40B GC in UpdateAllTimers() function of TimerManager class that was caused by foreach and my unity version is 5.4.4. However, all the lower versions have this issue as to my knowlege.
Before optimize:

foreach (Timer timer in this._timers)
{
      timer.Update();
}

After optimize

for (int i = 0; i < this._timers.Count; i++)
{
     this._timers[i].Update();
}

[Alexander Biggs]

Sorry for the incredibly, incredibly slow response. According to https://jacksondunstan.com/articles/3805 this should no longer be an issue after Unity 5.6.