Under Silverlight only public types may be serialized with the DataContractSerializer. If you want to make your data classes internal to your assembly and serialise them for use in a WCF service you will find that the service call will fail at runtime with a SecurityException inside a misleading exception...

APPA Mundi recently worked with the Microsoft Surface team to put together a code sample showing the exchange of information from a Surface to a nearby Bluetooth enabled phone using standard protocols. This means that any phone which supports standard Object Exchange (OBEX) protocols can receive items...