.NET Framework 3.5 New Features

Faster .NET Framework execution

Faster garbage collection

Smarter, faster NGen requiring smaller working set RAM

64 bit client improvements

ThreadPool performance improvements

Security check caching during NGen

you can access databases or trigger workflows without having to leave VB or C#. Under the covers, Orcas embeds LINQ, otherwise known as "Language Integrated Query," a feature that Microsoft initially introduced in pre-release versions back in 2005

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The MOSS
Master of Solution Service

LINQ lets you develop database queries in VB.NET or C#, without forcing you to drop down in to SQL. LINQ is part of a long tradition that began in the 4GL era of simplifying database access. While the early 4GLs, such as PowerBuilder, let you map queries visually, you still had to know SQL. That's what LINQ is intended to bridge.

BigInteger, HashSet and DateTime2 types

NSA Suite ”B” and FIPs compliant cryptography

Lightweight Reader/Writer Lock Classes

Anonymous and Named Pipes IO Classes

Integration with Event Tracing for Windows

New Addin hosting model for extensibility

Workflow Enabled Services – Process and Messaging together


Using workflow to provide for durable and long-running services. New Tools, WF activities and new programming model classes have been added to simplify building workflow-enabled services using WF and WCF. This allows a .NET Framework developer to build business logic for a service using WF and expose messaging from that service using WCF. These improvements not only provide tools for this scenario but they reduce the amount of glue code that was previously required.

Web 2.0 Friendly and AJAX Enabled WCF Services


Ajax is a web development technique for making asynchronous exchanges of small amounts of data between browser and web service calls from the browser client script to the web server. A programming model is provided for building Ajax style web applications using WCF services. An HTTP programming model is also provided allowing for REST style web services.