Exporting to PNG and SVG is in our backlog and will be added in the Q2 frame. Currently what you can do is to write it on your own using for example our helpers for Image editing and exporting (or use the build in Silverlight writing to bitpam). You have to just pass the diagram. The only problem you might have is that the shapes should be in the viewable area, in order to be part of the image.
Hope this helps.
the Telerik team
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