Developer Tools

    Thank you for downloading

    • .NET Framework 1.0 Service Pack 3 Tech Preview

      If your download does not start after 30 seconds, Click here
        • Install Instructions:
          1. Click the Download button on this page to start the download.
          2. Do one of the following:
            • To start the installation immediately, click Open or Run this program from its current location.
            • To copy the download to your computer for installation at a later time, click Save or Save this program to disk.
          Future Upgrade to Final Release: After you try this Tech Preview, you must have your original source media if you want to install the .NET Framework 1.0 SP3 Final Release, available later in 2004. At that time, you will need to uninstall the SP3 Tech Preview, reinstall .NET Framework 1.0 using your original source media, and then download the Final Release SP3 patch. Please note that the original source media is not necessary to install this Tech Preview.

    Popular downloads

      • 01

        Microsoft .NET Framework 4 (Web Installer)

        The Microsoft .NET Framework 4 web installer package downloads and installs the .NET Framework components required to run on the target machine architecture and OS. An Internet connection is required during the installation. .NET Framework 4 is required to run and develop applications to target the .NET Framework 4.

      • 04

        Microsoft .NET Framework 3.5 Service Pack 1

        Microsoft .NET Framework 3.5 Service Pack 1 is a full cumulative update that contains many new features building incrementally upon .NET Framework 2.0, 3.0, 3.5, and includes cumulative servicing updates to the .NET Framework 2.0 and .NET Framework 3.0 subcomponents.

      • 05

        Microsoft .NET Framework 3.5

        Microsoft .NET Framework 3.5 contains many new features building incrementally upon .NET Framework 2.0 and 3.0, and includes .NET Framework 2.0 service pack 1 and .NET Framework 3.0 service pack 1.

    Loading your results, please wait...

    Free PC updates

    • Security patches
    • Software updates
    • Service packs
    • Hardware drivers

    Microsoft suggests

    Download free tools to build apps for Windows.
    Download free tools to build apps for Windows
    Develop apps that reach the entire family of Windows devices.
    Get started