Add-AppxPackage -Path "C:\Path\To\Microsoft.UI.Xaml.2.8.appx" Microsoft Learn Method 3: Using WinGet
He found the link on the NuGet gallery— Microsoft.UI.Xaml.2.8.6 (or whatever the latest minor revision was). He clicked Download .
For developers integrating WinUI 2.8 into a Visual Studio project, the official and recommended method is using NuGet Package Manager:
You can obtain the package from several official sources, depending on your needs.
Alternatively, switch the first drop-down to and enter: 9NTPX1S0279B (The official ID for the WinUI 2 runtime). Click the Check mark (Search) button.
The server will populate a list of .appx or .appxbundle files. You must download the architecture matching your operating system: For standard 64-bit Intel or AMD computers. x86: For legacy 32-bit machines.
It was 2:00 AM in the downtown apartment he used as a coding bunker. Outside, the city was quiet, but inside, the hum of his server rack was the only thing keeping him sane. He was the sole developer for "Polyphony," a logistics app meant to revolutionize how local bakeries distributed their goods. It was a simple idea, executed with elegant code—until the Windows Store certification process choked on it.
Click the button to generate the official download links.
"The macro-assembly or framework 'Microsoft.UI.Xaml.2.8' was not found."
Add-AppxPackage -Path "C:\Path\To\Microsoft.UI.Xaml.2.8.appx" Use code with caution. Copied to clipboard
Important assumptions made: you want the official 2.8 release and a downloadable Appx/MSIX runtime package for installing or bundling. If you need a different scenario (project NuGet, Visual Studio integration, or WinUI 3 vs WinUI 2), say which.
Add-AppxPackage -Path "C:\Path\To\Microsoft.UI.Xaml.2.8.appx" Microsoft Learn Method 3: Using WinGet
He found the link on the NuGet gallery— Microsoft.UI.Xaml.2.8.6 (or whatever the latest minor revision was). He clicked Download .
For developers integrating WinUI 2.8 into a Visual Studio project, the official and recommended method is using NuGet Package Manager: microsoft.ui.xaml.2.8 appx download
You can obtain the package from several official sources, depending on your needs.
Alternatively, switch the first drop-down to and enter: 9NTPX1S0279B (The official ID for the WinUI 2 runtime). Click the Check mark (Search) button. Add-AppxPackage -Path "C:\Path\To\Microsoft
The server will populate a list of .appx or .appxbundle files. You must download the architecture matching your operating system: For standard 64-bit Intel or AMD computers. x86: For legacy 32-bit machines.
It was 2:00 AM in the downtown apartment he used as a coding bunker. Outside, the city was quiet, but inside, the hum of his server rack was the only thing keeping him sane. He was the sole developer for "Polyphony," a logistics app meant to revolutionize how local bakeries distributed their goods. It was a simple idea, executed with elegant code—until the Windows Store certification process choked on it. Alternatively, switch the first drop-down to and enter:
Click the button to generate the official download links.
"The macro-assembly or framework 'Microsoft.UI.Xaml.2.8' was not found."
Add-AppxPackage -Path "C:\Path\To\Microsoft.UI.Xaml.2.8.appx" Use code with caution. Copied to clipboard
Important assumptions made: you want the official 2.8 release and a downloadable Appx/MSIX runtime package for installing or bundling. If you need a different scenario (project NuGet, Visual Studio integration, or WinUI 3 vs WinUI 2), say which.