Microsoft.Phone.Controls.ListPickerPage.AnimationForElement C# (CSharp) Method

        private Storyboard AnimationForElement(FrameworkElement element, int index)
        {
            double delay = 30;
            double duration = (IsOpen) ? 350 : 250;
            double from = (IsOpen) ? -45 : 0;
            double to = (IsOpen) ? 0 : 90;
            ExponentialEase ee = new ExponentialEase()
            {
                EasingMode = (IsOpen) ? EasingMode.EaseOut : EasingMode.EaseIn,
                Exponent = 5,
            };

            DoubleAnimation anim = new DoubleAnimation()
            {
                Duration = new Duration(TimeSpan.FromMilliseconds(duration)),
                From = from,
                To = to,
                EasingFunction = ee,
            };

            Storyboard.SetTarget(anim, element);
            Storyboard.SetTargetProperty(anim, new PropertyPath("(UIElement.Projection).(PlaneProjection.RotationX)"));

            Storyboard board = new Storyboard();
            board.BeginTime = TimeSpan.FromMilliseconds(delay * index);
            board.Children.Add(anim);

            return board;
        }