Microsoft.Phone.Controls.ListPicker.OnItemsPresenterHostParentSizeChanged C# (CSharp) Method

        private void OnItemsPresenterHostParentSizeChanged(object sender, SizeChangedEventArgs e)
        {
            // Pass width through the Canvas
            if (null != _itemsPresenterPart)
            {
                _itemsPresenterPart.Width = e.NewSize.Width;
            }

            // Update clip to show only the selected item in Normal mode
            _itemsPresenterHostParent.Clip = new RectangleGeometry { Rect = new Rect(new Point(), e.NewSize) };
        }