private void FadeOut(int durationInMilliseconds)
        {
            this.timer.Enabled = false;
            var animation = new ByteAnimation(0, new Duration(TimeSpan.FromMilliseconds(durationInMilliseconds)));

            this.BeginAnimation(HandInterfaceElement.InterfaceOpacityProperty, animation);
        }
        private void FadeIn(int durationInMilliseconds)
        {
            var animation = new ByteAnimation(100, new Duration(TimeSpan.FromMilliseconds(durationInMilliseconds)));

            this.BeginAnimation(HandInterfaceElement.InterfaceOpacityProperty, animation);
        }