It is easy to use introduction to Microsoft Windows Communication Foundation (WCF) is ideal for developers who want to learn to build services on a corporate network or as part of the enterprise system. Built into Windows Vista and Longhorn, and available for Windows XP and Windows 2003, WCF provides a platform for service-oriented architecture (SOA) that enables communication between the secure and reliable systems in an organization or on the Internet. Learning WCF removes the complexity of using this platform by providing detailed answers, explanations and code examples to the questions most frequently asked by software developers. Windows Communication Foundation (or WCF, formerly code-named "Indigo") provides a set of programming APIs that make it easy to build and consume secure, reliable services, and transacted.