Add longPathAware to Windows app manifest in templates #32107
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jfversluis
added
platform/windows
area-templates
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Pull Request Overview
This PR enables long path support for Windows applications by adding the longPathAware setting to app manifests across all .NET MAUI project templates. This addresses issues where applications encounter path length limitations on Windows, fixing issue #25837.
Key Changes:
- Added
<longPathAware>true</longPathAware>to Windows app manifests in all MAUI templates - Ensures new projects created from templates can handle file paths longer than the traditional 260-character limit
Reviewed Changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/Templates/src/templates/maui-multiproject/MauiApp.1.WinUI/app.manifest | Added longPathAware setting to multi-project WinUI template |
| src/Templates/src/templates/maui-mobile/Platforms/Windows/app.manifest | Added longPathAware setting to mobile template's Windows platform manifest |
| src/Templates/src/templates/maui-blazor/Platforms/Windows/app.manifest | Added longPathAware setting to Blazor template's Windows platform manifest |
| src/Templates/src/templates/maui-blazor-solution/MauiApp.1/Platforms/Windows/app.manifest | Added longPathAware setting to Blazor solution template's Windows platform manifest |
|
/backport to release/10.0.1xx |
|
Started backporting to release/10.0.1xx: https://github.com/dotnet/maui/actions/runs/18725159402 |
rmarinho
approved these changes
Oct 22, 2025
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Description of Change
The error in #25837 seems to be caused by the fact that the WinUI app is not "long path aware", adding this setting to the default templates should mitigate this problem.
Also see: https://learn.microsoft.com/windows/win32/fileio/maximum-file-path-limitation?tabs=registry#application-manifest-updates-to-declare-long-path-capability
Issues Fixed
Fixes #25837