What is the .NET Framework 3.0?
Windows Vista was developed from the ground up to address the barriers associated with creating these kinds of applications. System services and new APIs handle many of the hard problems associated with such applications, so that developers can focus on the particular problem that their software is addressing. The new range of APIs and services are embodied in the .NET Framework 3.0 (formerly WinFX). The .NET Framework 3.0 is a core component of the Windows Vista operating system, and is installed by default. This new set of managed interfaces represents an incremental release of the managed interfaces found in the .NET Framework 2.0, because there are no changes to the version of the .NET Framework 2.0 components with the .NET Framework 3.0. Instead there new technologies have been added: Windows Presentation Foundation (WPF), Windows Workflow Foundation (WF), Windows Communication Foundation (WCF), and Windows CardSpace. http://www.netfx3.