Microsoft Corp. Wednesday announced the release of the first beta release of its Windows Vista client operating system, and with it the company also announced official names for the operating system's presentation and communication subsystems, formerly known by the code names "Avalon" and "Indigo," respectively.

According to sources, Microsoft will officially name Avalon the Windows Presentation Foundation (WPF) and Indigo the Windows Communication Foundation (WCF). Microsoft officials said Windows Vista, formerly known as Longhorn, offers substantial benefits to developers, particularly around WinFX, the managed code programming model that builds on the .Net Framework.


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