Brian Myers, Foundations of WF: an Introduction to Windows Workflow Foundation (Repost)

This book, unlike most of the Microsoft WF samples, has code in both VB .NET and C#. All the examples–and there are many–have VB .NET code, and many have the accompanying C# code. This book will allow you to begin creating new workflow applications easily in either VB .NET or C#. Each chapter includes an introduction to one or more activities that make up WF, along with examples of how to use each activity. Many chapters include a final section providing a real world example (a purchase order system).