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Offline installation of the Windows App SDK C# extension for Visual Studio fails

Applies to:  Visual Studio 2022

Symptoms

When you install the Windows App SDK C# extension for Visual Studio offline, it fails with the following error message:

Install Failed
The install of 'Windows App SDK C# VS2022 Templates' was not successful for all the selected products.
For more information, click on the install log link at the bottom of the dialog.
Windows App SDK C# VS2022 Templates
One or more errors occurred.

Screenshot of the error message when you install the Windows App SDK C# extension for Visual Studio 2022 offline.

Resolution

To perform an offline installation of the Windows App SDK extension for Visual Studio, run the following command line:

"C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\ServiceHub\Services\Microsoft.VisualStudio.Setup.Service\VSIXInstaller.exe" /noextensionpack <path to the WindowsAppSDK VSIX>

Replace <path to the WindowsAppSDK VSIX> with the actual file path of the Windows App SDK VSIX extension file. For more information, see WinApp SDK Dev 17 Offline Install Failure.

Additionally, you can use Create your first WinUI 3 (Windows App SDK) project to test a sample WinUI 3 project using the Windows App SDK.