.NET Framework 3.5 SP1

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Microsoft .NET Framework 3.5 contains new features which have been built upon .NET Framework 2.0 and 3.0, and includes .NET Framework 2.0 service pack 1 and .NET Framework 3.0 service pack 1.
Microsoft .NET Framework 3.5 includes:
- ASP .NET AJAX to create quickly web experiences which are more efficient, interactive and highly-customized.
- New web protocol support to create WCF services including: AJAX, JSON, REST, POX, RSS, ATO, WS -*.
- Etc…