We've come across a few documents that when loaded into the winforms pdf viewer, it shows as a blank page. Looking online, the most likely reason is due to unsupported features in the document. We currently like using the telerik control over just a web browser because we can load the pdf's into the UI straight as a stream, rather than saving the document to file first, so don't want to go back to the webbrowser if we don't have to. Were wondering if we could have both the telerik control and a web browser overlaid on top of each other and show one vs the other depending on whether the telerik control can render it or not, but have not been able to find any property of the telerik control that would let us know it couldn't render it properly. Is there a property that anyone is aware of to detect this?