Quote Originally Posted by George2
It is mentioned -- "To increase performance, the XML serialization infrastructure dynamically generates assemblies to serialize and deserialize specified
types."
This means an assembly is generated at the run-time which actually converts the Object into an XML stream. Read the whole article and you will understand what it means.

Quote Originally Posted by George2
What means the assemblies?
Assemblies in .NET on Wiki

Look at the code carefully and see what exactly is happening. Is there a Hashtable somewhere? Read the comments and also read the description and explanation that is given before and after the code on MSDN.