The Microsoft .NET
Framework 3.0 (formerly 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
(WCS, formerly "InfoCard").
WinFX is the new programming interface
introduced in Windows “Vista”.
It
is the new set of managed code API that
Microsoft releases with Vista.
It
is a unified, managed-code programming model
that extends the .NET Framework 2.0 and enables
you to build secure, next-generation,
Windows-based applications.

Figure :
.NET Framework 3.0.
WPF (formally known as “Avalon”) is a new
user interface subsystem and API based on XML,
.NET and vector graphics.
WCF (formally known as “Indigo”) is
service-oriented messaging system, which allows
programs to interoperate locally or remotely
similar to web services. It is the Messaging
framework of WinFX.
WWF allows task automation and integrated
transactions using workflows.
What Windows
CardSpace Provides
Four aspects of this technology stand out as
most important:
- Support for any digital identity system
- Consistent user control of digital
identity
- Replacement of password-based Web login
- Improved user confidence in the identity
of remote applications
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