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.NET Framework Conceptual Overview

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Learning Resources

Download .NET Framework 3.5 SP1

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.

MSDN Subscribers: Download the .NET Framework 4 Release Candidate

.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.

.NET Framework Highlights

MSDN Subscribers: Download the VS 2010 Release Candidate
The Visual Studio 2010 and .NET Framework 4 Release Candidate is available to MSDN subscribers on Monday, February 8th, with general availability on February 10th.

Building Composable Apps in .NET 4 with the Managed Extensibility Framework
Glenn Block explains how the Managed Extensibility Framework, a new library coming in .NET Framework 4.0, tackles the longstanding issue of building applications and components that can be reused and extended by others. Learn how to build apps that can use new functionality introduced by developers,... Más

CLR Inside Out: Formatting and Parsing Time Intervals in the .NET Framework 4
Learn about enhanced TimeSpan formatting and parsing features coming in the .NET Framework 4, and some helpful tips for working with TimeSpan values.

Featured Library Content

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

WPF Performance Suite
Learn about the WPF performance tools for .NET 3.5.
Tuesday, Feb 9 - Microsoft

Animation Overview
WPF allows you to create simple and complex animations in your application. Learn more in this arti... Más
Monday, Jan 11 - Microsoft

List(T).Find Method
Improved code examples for Find, FindAll, FindIndex, FindLast, FindLastIndex methods for the generic... Más
Saturday, Dec 5 - Microsoft

More .NET Framework Library Content...

More .NET Framework Resources

	MSDN Subscribers: Download the .NET Framework 4 Release Candidate The Visual Studio 2010 and .NET Framework 4 Release Candidate is available to MSDN subscribers on Monday, February 8th, with general availability on February 10th.
	Give Us Your Feedback on .NET Framework Documentation Help us help you by taking 10 minutes to fill out our Content Survey on how to improve the Visual Studio and .NET Framework documentation.
	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.