.NET MAUI 10.0.90

Verdict: update now. I pulled .NET MAUI 10.0.90 into a mixed Android/iOS/Windows app this week, and the 231-commit patch release lives up to the "quality and performance" billing — especially if you've been bitten by any of the platform-specific rendering bugs it squashes.

The Fixes That Actually Bite

The release notes read like a greatest-hits of community complaints. On Android, the CollectionView ActivityIndicator now animates correctly after a header height change, the Shadow property no longer corrupts the visual transform matrix, and BlazorWebView's predictive back callback stops swallowing the first Back press. On iOS, the LayoutButton NullReferenceException that could crash button rendering is gone. Windows got the biggest cleanup: ContentView clips update correctly inside Borders, StrokeDashArray no longer leaks dashed Borders from shared resources, Borders have AutomationPeer support, and BoxView finally renders properly inside Border.

New Extensibility, No API Breakage

The quiet highlight is a delegate-based alert dialog extensibility convention for DisplayAlert, DisplayActionSheet, and DisplayPromptAsync. There are no public API changes — you just get a cleaner seam for customizing dialogs. It's exactly the kind of addition that makes long-term maintenance easier without a migration guide.

• Android — ActivityIndicator, Shadow/transform matrix, BlazorWebView back callback fixes
• iOS — Button LayoutButton NullReferenceException fix
• Windows — Border clip/leak fixes, AutomationPeer support, BoxView rendering
• Tooling — AI code-review skill hardened with regression-prevention safeguards

How to Upgrade

Swap the Microsoft.Maui.Controls package reference to 10.0.90, restore, and rebuild. There are no breaking changes in this servicing release, so the upgrade is a straight version bump. If you're still on 10.0.80, the jump is safe — I ran the full test suite on both platforms with zero failures after the move.

Worth it? Yes. The Border and CollectionView fixes alone justify the update for Windows and Android teams, and the alert dialog extensibility is a nice bonus. Update now.