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The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at How to: Update a Visual Studio Extension.

You can update a Visual Studio extension on your system by using Extensions and Updates to install the updated version. If you create an updated version of an extension, you can signify it as updated by incrementing the version number in the VSIX manifest.

Updates are installed when the VSIX manifest of the incoming extension has the same ID as the installed one and a higher Version number. If the Version number is the same or lower, the package cannot be installed. If the ID values do not match, the package that is not yet installed is recognized as a separate extension.

To help prevent conflicts during development, we recommend that you uninstall earlier versions of extensions in progress, and also uninstall or disable any other potentially conflicting extensions.