Trace Id is missing

Unlock your potential with Microsoft Copilot

Get things done faster and unleash your creativity with the power of AI anywhere you go.
Microsoft Copilot app being utilized to generate pictures of a singing dog, assisting to identify a flower, and helping to generate an email to congratulate a coworker on a promotion.

Visual Studio Async CTP (Version 3)

The Visual Studio Async CTP (Version 3) extends Visual Studio 2010, providing a new, streamlined syntax for asynchronous development.

Important! Selecting a language below will dynamically change the complete page content to that language.

  • Version:


    Date Published:


    File Name:


    File Size:

    22.1 MB

    The original Async CTP from PDC 10 brought asynchronous programming to C# and Visual Basic in Visual Studio 2010. This update brings the following:
    • Compatible with Visual Studio 2010 SP1, which is now required.
    • Compatible with non-English installations of Visual Studio and with Visual Studio Express.
    • Compatible with Silverlight 5.
    • Compatible with Windows Phone SDK 7.1 (Mango).
    • Compatible with Roslyn CTP
    • Includes various bug-fixes and changes, detailed in the Readme and documentation.
    • Includes a new EULA for production use. Note - This license does not constitute encouragement for you to use the CTP for your production code. The CTP remains an unsupported and use-at-your-own-risk Technology Preview. However, we’ve received many requests from developers to use the CTP for production code, and so have changed the license to allow that.
  • Supported Operating Systems

    Windows 7, Windows Server 2003, Windows Server 2008, Windows Vista, Windows XP

    1. Click the Download button 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.
  • Prerequisites
    1. Install Visual Studio 2010 SP1.
    2. This version of the Async CTP can be installed on its own, or can be installed as an upgrade over the previous “Async CTP SP1 Refresh” – it is not necessary to uninstall first.
    3. Run Windows Update and install all available updates, including optional updates. (As an alternative to Windows update, it’s okay to just manually install KB2468871).
    4. If you want to do phone development, install Windows Phone Developer Tools.
    Installation Notes
    • Installation may take an hour or more, depending on download speed and machine state.
    • A Start menu Readme item will not be created for users on computers running Windows XP. To access the Readme, navigate to My Documents > Microsoft Visual Studio Async CTP.
Follow Microsoft