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copied!<p>You may put the ImageDrawing into an Image control and render that into a <a href="http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.rendertargetbitmap.aspx" rel="nofollow">RenderTargetBitmap</a>, which is a BitmapSource and can therefore be serialized by a <a href="http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.bitmapencoder.aspx" rel="nofollow">BitmapEncoder</a> (PngBitmapEncoder in this example).</p> <pre><code>public void SaveDrawingToFile(Drawing drawing, string fileName, double scale) { var drawingImage = new Image { Source = new DrawingImage(drawing) }; var width = drawing.Bounds.Width * scale; var height = drawing.Bounds.Height * scale; drawingImage.Arrange(new Rect(0, 0, width, height)); var bitmap = new RenderTargetBitmap((int)width, (int)height, 96, 96, PixelFormats.Pbgra32); bitmap.Render(drawingImage); var encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmap)); using (var stream = new FileStream(fileName, FileMode.Create)) { encoder.Save(stream); } } </code></pre> <p>Note that you don't actually need a BitmapImage for encoding, because BitmapSource (or any derived class like RenderTargetBitmap) will be accepted as argument to <a href="http://msdn.microsoft.com/en-us/library/ms615993.aspx" rel="nofollow">BitmapFrame.Create</a>.</p> <hr> <p>A slightly different solution would involve a <a href="http://msdn.microsoft.com/en-us/library/system.windows.media.drawingvisual.aspx" rel="nofollow">DrawingVisual</a> instead of a DrawingImage:</p> <pre><code>public void SaveDrawingToFile(Drawing drawing, string fileName, double scale) { var drawingVisual = new DrawingVisual(); using (var drawingContext = drawingVisual.RenderOpen()) { drawingContext.PushTransform(new ScaleTransform(scale, scale)); drawingContext.PushTransform(new TranslateTransform(-drawing.Bounds.X, -drawing.Bounds.Y)); drawingContext.DrawDrawing(drawing); } var width = drawing.Bounds.Width * scale; var height = drawing.Bounds.Height * scale; var bitmap = new RenderTargetBitmap((int)width, (int)height, 96, 96, PixelFormats.Pbgra32); bitmap.Render(drawingVisual); var encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmap)); using (var stream = new FileStream(fileName, FileMode.Create)) { encoder.Save(stream); } } </code></pre>

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