Support for Microsoft .NET Framework

Help and support for Microsoft .NET Framework 4.5, 4, 3.5, 3.0, 2.0 and 1.1. Links to troubleshooting information, community, and top issues.

Key resources

Key resources

Download .NET Framework 4.5.1 Now
Download the RTM version of .NET Framework 4.5.1.

.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.

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

Visit the following related Solution Centers for support information including key resources, top issues, community resources, support options, and support lifecycle details.
Visual Studio
ASP .NET
Silverlight

Community

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.

Self-support options

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 Online (MPO)
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.

Assisted support options

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

Paid incident support

For support with a .NET Framework installation issue, click on the version below that is applicable to you.
.NET Framework 4.5.1
.NET Framework 4.5
.NET Framework 4
.NET Framework 2
.NET Framework 1.1

For support with specific components of the .NET Framework, please submit a support request under the component. Common components include:
ASP.NET
AJAX
Windows Communication Foundation
Windows Workflow Foundation

Contract incident support

Contact a Microsoft Support Professional using your MSDN Subscription
MSDN Subscribers may be entitled to receive up to 4 technical support incidents depending on the subscription level. Learn more.

Microsoft Premier Online (MPO)
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.

Support lifecycle

Learn more about .NET Framework support lifecycle

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
To view Support Lifecycle information for a specific version of .NET Framework, select the product and version below that is applicable to you.

.NET Framework 4.5.1
.NET Framework 4.5
.NET Framework 4
.NET Framework 3.5
.NET Framework 3.0
.NET Framework 2.0
.NET Framework 1.1

Clarification on the support lifecycle for .NET Framework versions 3.5, 3.0 and 2.0
Last Review : 15 March 2013