Channel9Downloader.Controls.FrameworkElementAdorner.DetermineWidth C# (CSharp) Method

        private double DetermineWidth()
        {
            if (!double.IsNaN(PositionX))
            {
                return _child.DesiredSize.Width;
            }

            switch (_child.HorizontalAlignment)
            {
                case HorizontalAlignment.Left:
                    {
                        return _child.DesiredSize.Width;
                    }

                case HorizontalAlignment.Right:
                    {
                        return _child.DesiredSize.Width;
                    }

                case HorizontalAlignment.Center:
                    {
                        return _child.DesiredSize.Width;
                    }

                case HorizontalAlignment.Stretch:
                    {
                        return AdornedElement.ActualWidth;
                    }
            }

            return 0.0;
        }