Support for Microsoft .NET Framework

Key Resources

Download .NET Framework 4 Now
Download the RTM version of the .NET Framework from the MSDN .NET Framework Developer Center.

.NET Framework Product Home Page
Visit the .NET Framework Home Page for product information, news, technical resources, and more.

.NET Framework Developer Center
The .NET Framework Developer Center is the primary resource for Developers seeking resources to begin developing with .NET Framework.

MSDN Library for .NET Framework
The MSDN Library is an essential source of information for developers using Microsoft tools, products, technologies and services. The MSDN Library includes how-to and reference documentation, sample code, technical articles, and more.

Got a question? Post a question in the .NET Framework Forums on MSDN
Ask a question in the .NET Framework Forums. Most questions answered in 24 hours or less.

Top Solutions

An update for the .NET Framework 3.5 Service Pack 1 is available
An update for the Microsoft .NET Framework 3.5 Service Pack 1 (SP1) is available. This article describes information about the issues that the update for the .NET Framework 3.5 SP1 fixes.

List of changes and fixed issues in the .NET Framework 3.5 Service Pack 1
This article describes the list of hotfixes and new features/functionality included in the .NET Framework 3.5 Service Pack 1.

MS09-061: Description of the security update for the Microsoft .NET Framework 1.1 SP1: October 13, 2009
This article provides additional information for Security Bulletin MS09-061 (for .NET Framework 1.1 Service Pack 1 installations), including guidance on where to get the updates and more details on the security bulletin and the issues it resolves.

MS09-061: Description of the security update for the Microsoft .NET Framework 2.0 SP2 and the Microsoft .NET Framework 3.5 SP1: October 13, 2009
This article provides additional information for Security Bulletin MS09-061 (for .NET Framework 2.0 Service Pack 2 installations), including guidance on where to get the updates and more details on the security bulletin and the issues it resolves.

How to manually remove and then reinstall the .NET Framework 2.0
This article is primarily for Developers and IT Pros. You can use the methods in this article to troubleshoot installation issues in the Microsoft .NET Framework version 2.0. To use these methods, you should be familiar with the .NET Framework 2.0, Registry Editor, and Windows Installer.

How to determine which versions of the .NET Framework are installed and whether service packs have been applied
This article describes how to determine which versions of the Microsoft .NET Framework are installed. This article also helps you determine whether any .NET Framework service packs are installed.

• Scott Hanselman's blog post provides a good general understanding on the background and philosophy of .NET Framework versioning, and explains how this applies to a specific scenario for ASP.NET configuration.
• The .NET Framework Versions and Dependencies article provides more background on the incremental nature of .NET Framework versions up through 3.5 Service Pack 1, and discusses the dependencies between those versions.

Learn

Visual Studio 2010 and .NET Framework 4.0 Training Course
The Visual Studio 2010 and .NET Framework 4 Training Course includes videos and hands-on-labs designed to help you learn how to utilize the Visual Studio 2010 features and a variety of framework technologies including: C# 4.0, Visual Basic 10, F#, Parallel Computing Platform, WCF, WF, WPF, ASP.NET AJAX 4.0, ASP.NET MVC Dynamic Data.

.NET Framework Learning Center
Visit the .NET Framework Learning center for learning resources, including the "How Do I" video series, Tips & Tricks, book recommendations, and more.

MSDN Code Gallery
The MSDN Code Gallery provides hundreds of sample applications, code snippets, and other resources you can download and share with the developer community.

Related Solution Centers

Ask the Community

Got a question? Post a question in the MSDN Forums
The main MSDN site for all Visual Studio, language, and .NET Framework features and related technologies. Most questions are answered in 24 hours or less.

.NET Framework Forums
Ask a question in the .NET Framework Forums. Most questions answered in 24 hours or less.

.NET Framework Community Page on MSDN
Stay up-to-date on the latest buzz from the .NET Framework community.

MSDN Community Center
On this page you will find links to help you stay connected with the MSDN community. Read what people are saying about MSDN and see what people are doing with Microsoft technologies.

Blogs and Twitter Feeds

MSDN Blogs Home
Master listing of all MSDN Blogs by category, including OPML and RSS feeds.

.NET Framework Blogs and Twitter
Popular .NET Framework blogs and Twitter feeds.

Self-Support Options

Search the Knowledge Base
Search the Microsoft Knowledge Base for technical solutions to common break-fix issues with .NET Framework.

Got a question? Post a question in the .NET Framework Forums on MSDN
Ask a question or search for answers in the .NET Framework forums.  Experts are on hand to help. Most questions answers in 24 hours or less.

Use Microsoft Connect to provide product feedback
Register for and use Microsoft Connect to provide product feedback directly to Microsoft product groups and to find workarounds for common issues.

.NET Framework Developer Center
The .NET Framework Developer Center is the primary resource for Developers seeking resources to begin developing with .NET Framework.

Microsoft Premier Customers
Enterprise customers with a Premier account can visit Microsoft Premier Online for troubleshooting information or to open a support incident with a Microsoft support professional.

Microsoft Partners: Visit the Microsoft Partner Network
Microsoft Partners can select available support options on the Microsoft Partner Portal.

Contact a Microsoft Support Professional via e-mail, online submission or phone.

Paid Incident Support

Contract Incident Support

Contact a Microsoft Support Professional using your MSDN Subscription
As an MSDN Subscriber, you may be entitled to receive up to four (4) technical support incidents depending on your subscription level. These support incidents can be used to resolve technical break-fix issues in a non-production environment and are the equivalent of paid Professional Support incidents. You can use a technical support incident to find a solution to a production issue if you can replicate that issue in a non-production environment. Learn more.

Microsoft Premier Customers
Enterprise customers with a Premier account can visit Microsoft Premier Online for troubleshooting information or to open a support incident with a Microsoft support professional.

Microsoft Partners: Visit the Microsoft Partner Network
Microsoft Partners can access unlimited online support via the Microsoft Partner Network.

Microsoft Software Assurance
Get volume licensing and additional benefits with the Microsoft Software Assurance program.

View Support Lifecycle Information

Microsoft Support Lifecycle Policy
Visit the Support Lifecycle Policy page to view Microsoft’s guidelines for product support from availability to end of product lifecycle.

.NET Framework Lifecycle Policies