说明：  本书涵盖了所有设计开发基于WCF的面向服务应用程序所需的知识与技能。通过本书，你可以看到如何利用WCF内建的特性，例如服务托管、实例管理、并发管理、事务、离线队列调用以及安全。
(This book covers all the design and development of service-oriented WCF-based applications with the necessary knowledge and skills. Through this book, you can see how to use WCF built-in features, such as service hosting, instance management, concurrency management, transactions, offline queue calls and security.)