File-New-Project Labs: WinUI 3

Experimental WinUI 3 builds with nightly snapshots, community PRs, and custom features.

Build Channels

Nightly - FileNewProject.Labs.WinUI.Nightly

• Automated daily builds from microsoft/microsoft-ui-xaml:winui3/main
• Unmodified upstream code
• Version format: 0.0.0-nightly.yyyyMMddHHmmss.sha

NightlyCommunity - FileNewProject.Labs.WinUI.NightlyCommunity

• Nightly builds + curated community PRs
• Faster access to bug fixes waiting for official merge
• Version format: 0.0.0-nightlycommunity.yyyyMMddHHmmss.sha

Custom - FileNewProject.Labs.WinUI.Custom (coming later)

• NightlyCommunity + other experiments
• Custom modifications and features
• Version format: 0.0.0-custom.N

Build Schedule

All builds run automatically on a daily schedule:

Time	Event	Description
12:00 PM (04:00 AM PST)	Sync with upstream	Syncs main with microsoft/microsoft-ui-xaml:winui3/main
1:00 PM (05:00 AM PST)	Rebase nightlycommunity	Rebases nightly-community onto updated main
3:00 PM (07:00 AM PST)	Build world	Builds Nightly and NightlyCommunity packages

Getting Started

1. Create or edit nuget.config in your project:

   <?xml version="1.0" encoding="utf-8"?>
   <configuration>
     <packageSources>
       <add key="FileNewProject.Labs" value="https://nuget.pkg.github.com/File-New-Project/index.json" />
     </packageSources>
     <packageSourceCredentials>
       <FileNewProject.Labs>
         <add key="Username" value="YOUR_GITHUB_USERNAME" />
         <add key="ClearTextPassword" value="YOUR_GITHUB_PAT" />
       </FileNewProject.Labs>
     </packageSourceCredentials>
   </configuration>

   Note: Your GitHub Personal Access Token (PAT) must have read:packages scope.

2. Install a package:

dotnet add package FileNewProject.Labs.WinUI.Nightly --prerelease
# or
dotnet add package FileNewProject.Labs.WinUI.NightlyCommunity --prerelease

Nightly Community Included Fixes

The NightlyCommunity channel includes carefully selected community PRs that address critical bugs:

CueStyler Fixes:

• CueStyler: Fix TimedTextPadding being applied incorrectly

  • microsoft#9248

• CueStyler: Fix outline rendering of TimedTextCue elements

  • microsoft#9224

TreeView Fixes:

• RemoveAtEnd on TreeViewNodeVector broken
  • microsoft#10239

Disclaimers and Warnings

• Unofficial and unsupported - This is not an official Microsoft project
• No guarantees - Packages may be unstable, break, or be deleted
• Use at your own risk - Test thoroughly before using in production

License

This project maintains the same MIT license as the upstream microsoft/microsoft-ui-xaml repository.