.NET Framework Developer Center

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.NET Framework Highlights

Enforcing Complex Business Data Rules with WPF
Microsoft Windows Presentation Foundation (WPF) has a rich data-binding system.Find out more in the MSDN Magazine article.

Download .NET 4
The .NET Framework is Microsoft's comprehensive and consistent programming model for building applications that have visually stunning user experiences, seamless and secure communication, and more.

What's New in the .NET Framework 4
The .NET Framework 4 is highly compatible with applications that are built with earlier .NET Framework versions, except for some changes that were made to improve security, standards compliance, correctness, reliability, and performance.

A Developer's Introduction to Windows Workflow Foundation (WF) .NET 4
An overview of the most important new features and improvements in Workflow Foundation, with enough technical detail and code to help you as a developer understand how to use them.

.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.

.NET Services
Use .NET Services to connect cloud-based and cloud-aware applications.

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

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

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

Data Access
Use Entity Framework, Data Services, or ADO.NET to access data sources from your .NET apps.

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

.NET Micro Framework
Use the .NET Micro Framework to develop for resource-constrained devices.

Featured Library Content

Important updates and highlights of .NET Framework content in the MSDN Library.

Session-State Modes
ASP.NET session state enables you to store and retrieve values for a user as the user navigates ASP.... more
Thursday, Sep 2 by Microsoft

X509Certificate2 Class
Includes a new code example that shows how to encrypt and decrypt a file using a certificate from th... more
Thursday, Aug 26 by Microsoft

ASP.NET Routing
ASP.NET routing enables you to use URLs that do not have to map to specific files in a Web site. Bec... more
Wednesday, Aug 18 by Microsoft

More .NET Framework Library Content...

Managed Languages

	Visual Basic Developer Center Get information to help you use Visual Basic to develop .NET applications for Windows, the Web, and Office applications.
	Visual C# Developer Center Combined with the .NET Framework, Visual C# 2010 enables the creation of Windows applications, Web services, database tools, components, controls, and more.
	Microsoft F# Developer Center F# is a functional programming language for the .NET Framework. It combines the succinct, expressive, and compositional style of functional programming with the runtime, libraries, interoperability, and object model of .NET.

Download .NET 4

Download .NET 4

The .NET Framework 4 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.

Web Developers and Administrators: Install .NET 4 with the Web Platform Installer

More .NET Framework Resources

	Channel 9 Videos Watch videos and connect with your peers.
	Code Gallery Find the latest .NET code samples or upload your own.
	CodePlex Find open source projects on CodePlex or start your own.
	MSDN Magazine Read in-depth articles about .NET.
	patterns & practices Use Microsoft's proven practices for software engineering.