From the year-old-news department comes this nugget on Doug Purdy's old blog site. Do this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.diagnostics>
<switches>
<add name="XmlSerialization.Compilation" value="1" />
</switches>
</system.diagnostics>
</configuration>
and you will see the generated serialization/deserialization code. Here's help from, Christoph Schittko, an MS MVP on xml. Also, Chris Sells has a serializability tester application, XmlSerializerPreCompiler (scroll down).
Have fun!