.NET Framework Version 1.1

The .NET Framework version 1.1 is a component of the Microsoft Windows® operating system used to build and run Windows-based applications.

This page can help you determine whether or not you have the .NET Framework 1.1 installed already, and how general users and developers can obtain the .NET Framework.

• All Users: Check to See If You Have the .NET Framework 1.1 Installed
• General Users: Install Through Windows Update
• Developers: Download from the Microsoft Download Center
• Order on CD

All Users: Check to See If You Have the .NET Framework Installed

You can check to see if you already have the .NET Framework 1.1 installed by clicking Start on your Windows desktop, selecting Control Panel, and then double-clicking the Add or Remove Programs icon. When that window appears, scroll through the list of applications. If you see Microsoft .NET Framework 1.1 listed, the latest version is already installed and you do not need to install it again.

Note: Non-developers need to install the .NET Framework 1.1 to run applications developed using the .NET Framework 1.1.

In most cases, the creator of an application will alert you if you need to install the .NET Framework 1.1 Redistributable to run the application. However, with the number of .NET Framework-connected applications on the market growing rapidly, we encourage you to install the latest version of the .NET Framework 1.1 Redistributable if you haven't already.

General Users: Install Through Windows Update

If you only want to run applications built using the .NET Framework 1.1, download the .NET Framework 1.1 from Microsoft Windows Update.

Developers: Download from the Microsoft Download Center

For developers, the .NET Framework 1.1 makes it easy to rapidly create powerful software that maximizes performance, scalability, opportunities for integration, reliability, security, and the end-user experience, while minimizing the costs of deployment and management.

Microsoft .NET Framework 1.1 Software Development Kit

The Microsoft .NET Framework 1.1 Software Development Kit (SDK) includes the .NET Framework 1.1, as well as everything you need to write, build, test, and deploy applications using the .NET Framework 1.1, including documentation, samples, and command-line tools and compilers. If you have already installed Microsoft Visual Studio® .NET, you do not need to install the .NET Framework 1.1 SDK separately; Visual Studio .NET includes the SDK. If you want to distribute the .NET Framework 1.1 with your application, download the .NET Framework 1.1 Redistributable in addition to the SDK.

Get the .NET Framework 1.1 SDK from the Download Center.

The .NET Framework 1.1 SDK runs on:

• Windows Server 2003
• Microsoft Windows 2000 (Service Pack 2 recommended)
• Windows XP Professional and Home Edition (Windows XP Professional is required to run ASP.NET)

Note: Windows Millennium Edition and Windows NT 4.0 Terminal Server are not supported.