NFC Questions application can be used like a game - the first player can save a question and answers to the NFC tag; following players can write their own questions to NFC tag if they know the right answer.
Application contains following pages: Read, Question and Write.
Application reads and writes the NFC tag when phone is enough close to NFC tag with PublishBinaryMessage method using Windows:WriteTag.NFCQuestions as a protocol and subtype. All the pages are designed to support all the screen sizes in Windows Phone 8.
Read the whole story how the application works and get the source codes Nokia Developer Wiki.