WCF (Windows Communication Foundation) is a communication subsystem of Windows Vista (the old code name was Indigo). WCF applications can be developed using the various languages of Microsoft .NET. It is one of the four major components of the .NET 3.0 framework (along with WPF, CardSpace and WF), which is included in Windows Vista and Windows Server 2008. It is also possible to install this component on Windows XP and Windows Server. 2003.
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