安裝舊版的 MSIX 應用程式套件Install earlier versions of an MSIX app package
無需先移除應用程式，即可在裝置上執行舊版 MSIX 應用程式套件的安裝。Installation of earlier versions of an MSIX app package can be performed on a device without prior removal of the application. 觸發相同應用程式舊版的安裝，會導致用戶端檢閱安裝 MSIX 應用程式套件內包含的應用程式資訊清單檔案。Triggering an installation of an earlier version of the same application will cause the client to review the app's manifest file contained within the installing MSIX app package. 檢閱 appxmanifest.xml 檔案時將識別目前已安裝的應用程式與裝置上正在執行的安裝程式之間差異。The review of the appxmanifest.xml file will identify delta differences between the currently installed app and the installer being executed on the device. 此程序會維護 appdata 資料夾內儲存的資料。This process maintains the data stored within the appdata folder. 如果安裝了舊版的 MSIX 應用程式套件，將不會復原在安裝升級版本時所做的任何變更。Any changes that were made when installing the upgraded version will not be undone if an earlier version of the MSIX app package is installed.