WCF Binary XML and dictionaries

One of the encodings which come with WCF (since its first version, in .NET Framework 3.0) is a fast and lightweight encoding for XML documents. The WCF Binary XML format (“officially” called .NET Binary Format: XML Data Structure – http://msdn.microsoft.com/en-us/library/cc219210(v=PROT.10).aspx). It is essentially a new way of representing XML, without using the “normal” angle-bracket notation (