Highlights for me include a discussion on value and reference types, delegates for multithreading, reflection, attributes, COM interop, remoting, custom components (including UITypeEditor) and implementing Extender Provider controls (like the ToolTip control).

I discovered many details of the framework that had eluded me. For example, did you know that all value types inherit from the ValueType class? how to add custom properties to all controls on a form? or how to use COM interop to provide a smooth path for the migration of VB6 application to .NET?

On the down side, the chapters dealing with the subject of ADO.NET, which is itself in need of a few advanced books, only describe the more basics aspects of the technology. Also, there is no chapter on XML.

Overall though, Kimmel does an excellent job of putting together a wealth of advanced subjects in a compact package.