Book excerpt: Windows Workflow Foundation is part of a bundle of new products that update .NET 2.0 into .NET 3.0. This book is one of the first to cover this important addition to .NET, and aims to provide the reader with a solid grounding in how workflows are implemented, executed, maintained and customized. By comprehensively covering WF from setup through implementation to customization readers are given a ‘one stop’ grounding in the subject. Given the importance of this technology release, the fact that WF is a free add-on, and the book’s broad appeal, it will be useful to almost all existing or migrating .NET 2.0 developers.