Programming .NET Components By Juval Lowy

Programming .NET Components

By Juval Lowy

O’Reilly
April 2003
0-596-00347-1, Order Number: 3471
480 pages

Review by Christopher Brandsma

When I was reading the first three chapters of this book I could have sworn that it was miss-titled; it should have been called Component Oriented Programming in .NET. Just so we get this straight, this is not a book about the wonderful components in the .NET Framework that Microsoft has provided -- this is a book about CREATING components in the .NET Framework.

The next item that needs to be clarified: What is a component? If you are from the Delphi/VCL world, a component is a non-visual object that can be manipulated in design-time with the mouse and the property browser, while usually being dragged onto a form (TTimer, TDatabase, TSession, TTable, etc). But in this book a component is a class -- the simpler the class, the better. No inheritance unless absolutely necessary, no class hierarchies, but interfaces are cool.

Now, once you get beyond the philosophy lessons of the first three chapters, you are left with one outstanding book on practical .NET development. The chapter on Events is worth the price of admission alone. The chapter on Versioning is excellent as well, but the rest of the sections are every bit as good.

Many of the topics covered in the book are not things you will find in the help files, or if they are, they are too scattered to be useful. What is covered: a large number of best practices, defensive coding techniques (again the chapter on Events is gold), and general you-really-need-to-know-this topics.

One note, some of the topics covered are very large (Remoting and Security are two examples), and if you are interested in those topics, there are other books that deal with them individually.

Summary: if you are into creating top-quality .NET software you should own this book.