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copied!<p>After much poking around and with help from Matt and kbo4sho88, I finally found the correct way of doing it. In addition to the help from the other posters, I finally found that I need to call TransformToVisual and TransformBounds to get the bounding box that I need for the correct file size. But, before that, I had to call Measure and Arrange since these objects are not shown on a screen.</p> <p>Phew!</p> <pre><code>private static void CreateImageFile() { Grid workGrid; TextBlock workTextBlock; RenderTargetBitmap bitmap; PngBitmapEncoder encoder; Rect textBlockBounds; GeneralTransform transform; workGrid = new Grid() { VerticalAlignment = VerticalAlignment.Center, HorizontalAlignment = HorizontalAlignment.Center }; workTextBlock = new TextBlock() { Text = "Lorem ipsum dolor sit amet, consectetur adipisicing" + Environment.NewLine + "elit, sed do eiusmod tempor", FontFamily = new FontFamily("Verdana"), FontSize = 36, TextAlignment = TextAlignment.Center, RenderTransformOrigin = new Point(0.5, 0.5), LayoutTransform = new RotateTransform(-45) }; workGrid.Children.Add(workTextBlock); /* * We now must measure and arrange the controls we just created to fill in the details (like * ActualWidth and ActualHeight before we call TransformToVisual() and TransformBounds() */ workGrid.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); workGrid.Arrange(new Rect(0, 0, workGrid.DesiredSize.Width, workGrid.DesiredSize.Height)); transform = workTextBlock.TransformToVisual(workGrid); textBlockBounds = transform.TransformBounds(new Rect(0, 0, workTextBlock.ActualWidth, workTextBlock.ActualHeight)); /* * Now, create the bitmap that will be used to save the image. We will make the image the * height and width we need at 96DPI and 32-bit RGBA (so the background will be transparent). */ bitmap = new RenderTargetBitmap((int)textBlockBounds.Width, (int)textBlockBounds.Height, 96, 96, PixelFormats.Pbgra32); bitmap.Render(workGrid); encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmap)); using (FileStream file = new FileStream("TextImage.png", FileMode.Create)) encoder.Save(file); } </code></pre> <p>Of course this is just a sample (but working) method and the final one will be parameterized.</p> <p>Final part of the puzzle was found at <a href="https://stackoverflow.com/questions/581837/wpf-getting-new-coordinates-after-a-rotation">WPF: Getting new coordinates after a Rotation</a></p>

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