Programming Windows Workflow Foundation: Practical WF Techniques and Examples using XAML and C#: A C# developer's guide to the features and programming interfaces of Windows Workflow Foundation
A fast-paced and practical developer's road map to working with Windows WF, from compilation to the base activity library to runtime services. This book is for .NET developers who want to enhance their applications with flexible workflow capabilities using Microsoft Windows Workflow Foundation. The author assumes that you have read other texts on the overall architecture of WF and on WF application design strategies, and instead focuses on real-work implementation issues for C# developers.