The PackageManager and Package classes in the Windows SDK provide methods you can use to add or modify packages via App Installer files, or to retrieve information about apps with an App Installer association.
Checks for updates to the main app package listed in the .appinstaller file. It allows the developer to determine if the updates are required due to .appinstaller policy. This method currently only works for applications installed via .appinstaller files.
Streamline the installation and maintenance of software on your computer by using Windows Package Manager. Explain the front-end components and commands, the Windows Package Manager repository, and how to contribute to the repository.
This article provides all the details you need to manage deploying you MSIX applications in an retail environment. This article is targeted at developers.