.NET MAUI Issue 9879

This repository is an example for the issue dotnet/maui#9879 and also microsoft/microsoft-ui-xaml#7845

Run locally in Visual Studio (no issue)

Clone the project and open WinUIApp.sln in Visual Studio. Check, that the project WinUIApp is set as startup project and hit run on WinUIApp (Package). The app should build and run.

Building on the CLI

A normalpublish would be like this:

dotnet publish -r win10-x64 -f net6.0-windows10.0.19041.0 /bl .\WinUIApp\WinUIApp.csproj

However that gives an error:

error APPX1101: Payload contains two or more files with the same destination path 'WinUIClassLibrary.pdb'. Source files:
error APPX1101: ...\WinUIClassLibrary\bin\Debug\net6.0-windows10.0.19041.0\WinUIClassLibrary.pdb
error APPX1101: ...\WinUIClassLibrary\bin\Debug\net6.0-windows10.0.19041.0\win10-x64\WinUIClassLibrary.pdb

I have had to add a hack to avoid the RID reaching the library:

<PropertyGroup Condition="'$(RuntimeIdentifierOverride)' != ''">
	<RuntimeIdentifier>$(RuntimeIdentifierOverride)</RuntimeIdentifier>
</PropertyGroup>

This is now used like this:

dotnet publish /p:RuntimeIdentifierOverride=win10-x64 -f net6.0-windows10.0.19041.0 /bl .\WinUIApp\WinUIApp.csproj

The x64 workflow using my workaround can be found in .github/workflows/build_windows_x64.yaml The x86 workflow using my workaround can be found in .github/workflows/build_windows_x86.yaml

The failing workflow can be found in .github/workflows/build_windows_x64_nooverride.yaml

Reproduce on local machine

Open Powershell and navigate into the repo folder (after cloning the repo).

Run the following command to build a certificate:

New-SelfSignedCertificate `
  -Type Custom `
  -Subject "CN=User Name" `
  -KeyUsage DigitalSignature `
  -FriendlyName "Maui Issue 9879 test Cert Windows" `
  -CertStoreLocation "Cert:\CurrentUser\My" `
  -TextExtension @("2.5.29.37={text}1.3.6.1.5.5.7.3.3", "2.5.29.19={text}")

The publish the MSIX:

dotnet publish -r win10-x64 -f net6.0-windows10.0.19041.0 /bl .\WinUIApp\WinUIApp.csproj /p:GenerateAppxPackageOnBuild=true /p:AppxPackageSigningEnabled=true /p:PackageCertificateThumbprint="<YOUR_THUMBPRINT>"