MSIX Publish Fails in Visual Studio When Project References Multi-Target MAUI Class Library

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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[severity:It's more difficult to complete my work]

1. Create a .NET MAUI App targeting:
   net10.0-android; net10.0-ios; net10.0-maccatalyst; net10.0-windows10.0.19041.0

2. Create a MAUI Class Library targeting the same TFMs (multi-TFM MAUI library)

3. Add platform-specific code using #if WINDOWS (works correctly when multi-targeted)

4. Reference the library from the MAUI app

5. In Visual Studio:
   Build → Publish → Create App Packages → MSIX

6. Build fails with:
   “Payload contains two or more files with the same destination path ‘<LibraryName>.pdb’”
   OR
   “Metadata file ‘MauiLib.dll’ not found”
   OR
   other payload duplication errors

7. BUT running this works correctly:
   dotnet publish -f net10.0-windows10.0.19041.0 -c Release

Visual Studio Publish fails. CLI publish succeeds.

This has been an issue for 2 years.

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Original Comments

Feedback Bot on 12/4/2025, 01:47 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

[jfversluis]

Sorry for the ping-pong here, but this ticket was actually in the right place, opening the original ticket again.