WPF

Rectangle rotated = new Rectangle {Width = 100, Height = 60, Fill = Brushes.Orange};
rotated.RenderTransform = new TransformGroup {Children = {new RotateTransform(35), new TranslateTransform(60, 30)}};
canvas.Children.Add(rotated);

//GetDescentandBounds was returning empty, your elements are probably all loaded.
rotated.Loaded += ((s, e2) =>
                       {
                           //Bounds before render transform.
                           Rect r = VisualTreeHelper.GetDescendantBounds(rotated);
                           //After transform
                           r = rotated.RenderTransform.TransformBounds(r);

                           Rectangle border = new Rectangle {Width = r.Width, Height = r.Height, Stroke = Brushes.DodgerBlue, StrokeThickness = 2, RenderTransform = new TranslateTransform(r.X, r.Y)};
                           canvas.Children.Add(border);
                       });

Karl Shifflett wrote:

BTW: We have some openings on my team. Interested?