How to build a WinUI 3 app using .NET 6 in an AzureDevops pipeline? Getting: error NETSDK1095

Question

I have a blank WinUI3 desktop app:

I would like to build this app in an AzureDevops build pipeline:

pool:
  vmImage: 'windows-2022'

variables:
  solution: '$(Build.SourcesDirectory)/apps/windows/WinUI3VS2022NET6BlankApp/WinUI3VS2022NET6BlankApp.sln'
  buildPlatform: 'x64'
  buildConfiguration: 'Release'

steps:
- task: UseDotNet@2
  displayName: Use .NET 6.0
  inputs:
    packageType: 'sdk'
    version: '6.0.x'

- checkout: self
  fetchDepth: 1

- task: NuGetToolInstaller@1

- task: NuGetCommand@2
  inputs:
    restoreSolution: '$(solution)'

# Failure here :D
- task: VSBuild@1
  inputs:
    solution: '$(solution)'
    platform: '$(buildPlatform)'
    configuration: '$(buildConfiguration)'
    msbuildArgs: '/p:PublishReadyToRun=false'

I'm getting this error:

C:\hostedtoolcache\windows\dotnet\sdk\6.0.101\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Publish.targets(293,5): error NETSDK1095: Optimizing assemblies for performance is not supported for the selected target platform or architecture. Please verify you are using a supported runtime identifier, or set the PublishReadyToRun property to false. [D:\a\1\s\apps\windows\WinUI3VS2022NET6BlankApp\WinUI3VS2022NET6BlankApp\WinUI3VS2022NET6BlankApp\WinUI3VS2022NET6BlankApp.csproj]

I have tried setting PublishReadyToRun to false in the .csproj and .wapproj files, without luck.

The app builds fine locally with Visual Studio 2022.

Any ideas how I can build this blank WinUI 3 app in AzureDevops?

Answer 1

Turns out the correct place to disable PublishReadyToRun is in the:

Properties/PublishProfile/<profile name>.pubxml

file instead of the .csproj file.