public void PreviousLayout()
        {
            if (controls == null)
            {
                return;
            }
            int prev = controls.IndexOf(currentControlLayout) - 1;

            if (prev < 0)
            {
                prev = controls.Count - 1;
            }
            currentControlLayout = controls[prev];
            currentControlLayout.Select();
        }
        public void NextLayout()
        {
            if (controls == null)
            {
                return;
            }
            int next = controls.IndexOf(currentControlLayout) + 1;

            if (next >= controls.Count)
            {
                next = 0;
            }
            currentControlLayout = controls[next];
            currentControlLayout.Select();
        }