Microsoft’s .NET Framework 3.0 (formerly codenamed “WinFX”), is the new managed code programming model for Windows. It combines the power of the .NET Framework 2.0 with four new technologies: Windows Presentation Foundation (WPF), Windows Communication Foundation (WCF), Windows Workflow Foundation (WF), and Windows CardSpace™. Use the .NET Framework 3.0 to build applications that have visually compelling user experiences, seamless communication across technology boundaries, the ability to support a wide range of business processes, and an easier way to manage your personal information online.
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http://msdn2.microsoft.com/en-us/netframework/aa663309.aspx
Workflows
A workflow is a set of elemental units called activities that are stored as a model describing a real world process. Workflows provide a way of describing the order of execution and dependent relationships between pieces of short or long running work. This work passes through the model from start to finish and activities might be executed by people or by system functions.
http://msdn2.microsoft.com/en-us/library/aa349006.aspx
Windows Communication Foundation
Windows Communication Foundation (WCF) is Microsoft’s unified programming model for building service-oriented applications. It enables developers to build secure, reliable, transacted solutions that integrate across platforms and interoperate with existing investments.
http://msdn2.microsoft.com/en-us/library/ms733128.aspx
Windows Presentation Foundation
Windows Presentation Foundation (WPF) provides developers with a unified programming model for building rich Windows smart client user experiences that incorporate UI, media, and documents.
http://msdn2.microsoft.com/en-us/library/ms750441.aspx
