/// <summary> Increment or Decrement a given Keys Reference count. </summary>
        public static void AdjustReferenceCountFor(ScrollableControl inControl, ReferenceMode inMode = ReferenceMode.Increment, bool inOrientHorz = true)
        {
            int UpdateReferenceCountFor(int key, ReferenceMode inRefMode = ReferenceMode.Increment) =>
            Controller[key].Count += (int)inRefMode;                                 //ContainsKey() is called before this.

            int hash = inControl.GetHashCode();

            if ((inMode == ReferenceMode.Increment) && !Controller.ContainsKey(hash))
            {
                Controller.Add(hash, new ControllerNode()
                {
                    Count = 1
                });
            }
            else
            {
                if (UpdateReferenceCountFor(hash, inMode) < 1)
                {
                    Controller.Remove(hash);
                }
            }
        }