Futile.Update C# (CSharp) Method

    private void Update()
    {
        screen.Update();

        if(SignalUpdate != null) SignalUpdate();

        touchManager.Update();

        for(int s = 0; s<_stages.Count; s++)
        {
            _stages[s].Redraw (false,_isDepthChangeNeeded);
        }

        _isDepthChangeNeeded = false;

        if(shouldRunGCNextUpdate)
        {
            shouldRunGCNextUpdate = false;
            GC.Collect();
        }
    }