Welcome Sign in
.NET Framework Developer Center

Getting Started with .NET Framework

About .NET Framework

Get the Framework

Related

"How Do I?" Videos How Do I Videos RSS

More...

Download .NET Framework 3.5 Service Pack 1

The .NET Framework 3.5 Service Pack 1 (SP1) delivers more controls, improved start-up performance, AJAX support, and powerful new graphics features for client development. Visit the .NET Framework downloads page for more information.

.NET Framework Technologies

Windows Presentation Foundation (WPF)
Use WPF for building applications and high fidelity experiences in Windows Vista.

Windows Communication Foundation (WCF)
Use WCF for building and running connected systems.

Windows Workflow Foundation (WF)
Use WF for building workflow-enabled applications on Windows.

Windows Forms
Use Windows Forms for building smart client applications.

Base Class Libraries (BCL)
The BCL provides the fundamental building blocks for any application.

ASP.NET
ASP.NET is a free technology for building dynamic web applications.

ADO.NET
Use ADO.NET to access data sources such as Microsoft SQL Server, OLE DB, and XML.

Common Language Runtime (CLR)
The CLR is the .NET Framework run-time environment.

Windows CardSpace
Windows CardSpace provides the consistent user experience required by the identity metasystem.

.NET Compact Framework
Use .NET Compact Framework to build applications for Windows CE-based devices.

Featured in MSDN Magazine MSDN Magazine

More...

HighlightsHighlights
10-4 Episode 1: Working with the Visual Studio 2010 CTP VPC
10-4 Episode 1: Working with the Visual Studio 2010 CTP VPC
Announcing the first episode of 10-4, a new video podcast that will take a look at a different capability of Visual Studio 2010 and the .NET Framework 4.0 every week.
Visual Studio 2010 and .NET Framework 4.0 Training Kit - November Preview
Visual Studio 2010 and .NET Framework 4.0 Training Kit - November Preview
Learn how to utilize C# 4.0, Visual Basic 10, F#, Parallel Computing Platform, WCF, WF, WPF, ASP.NET AJAX 4.0, and ASP.NET MVC Dynamic Data.
Create Dynamic Web Applications with ASP.NET 3.5
Create Dynamic Web Applications with ASP.NET 3.5
Discover how to use ASP.NET Dynamic Data to create data-driven Web applications or build Model View Controller (MVC) applications with the ASP.NET page framework.
Article: Viewpoint - The Advent of Scale Computing
Article: Viewpoint - The Advent of Scale Computing
We are in the early stages of a transformation in computing. Microsoft's Oliver Sharp discusses the evolution of cloud platforms.
Page view tracker