Is Subclassing the RadPane supported? I've implemented a RadPane subclass to add of my own DependencyProperties and customizations. So far so good. However, it seems to break down on serialization (Save/Load). The Telerik Save/Load APIs will serialize a subclassed RadPane (e.g. XYZPane) as a RadPane. Therefore the custom subclassed type is lost on reload. Please advise on how I might achieve this or if it is something you would consider supporting in a future release.