Fresh Features & Fixes!

Hey, amazing people! 👋

It’s been a while (yes, keeping tiny humans alive takes a lot of time ⏳), but we’re back with a packed release full of improvements, fixes, and even support for .NET 9! Let’s dive in.

💡 What’s New?
🔹 .NET 9 Support – Staying ahead of the game.
🔹 Package Signing – Our NuGet package is now digitally signed, ensuring package integrity.
🔹 New Abstractions Package – We’ve introduced Wpf.Ui.Abstractions to separate WPF-specific and non-WPF code, making it easier to work across different platforms.
🔹 Updated Fluent System Icons – The latest Fluent System Icons are now included, bringing new symbols and improved visuals.
🔹 Flow Improvements – Moving from main to release instead of development for a smoother workflow.
🔹 Expander Fix – Content height now behaves properly (because we love consistency).
🔹 Performance Boost – Optimized string comparison and excluded unnecessary fields for snappier performance.

…And many more!

🎉 A Huge Welcome to New Contributors!
A massive shoutout to our first-time contributors who jumped in and made a difference! 🌟

💖 @JakobFerdinand, @bayeggex, @glenn-slayden, @Shavixinio, @JohnTasler, @nitheeshgovind, @elliot-gawthrop, @guspan-tanadi, @newtype0096, @xv, @4nonym0us, @jonlipsky, @AncientGrief, and @keeleycenc – welcome to the WPF UI family! 🎊

What's Changed

• Use flow from main to release, instead of development by @pomianowski in #1172
• Set Expander content height to * instead of Auto by @JakobFerdinand in #1186
• Fix: failing to correctly trigger the methods of the INavigationAware interface. by @textGamex in #1177
• Add support for ARM64, update extensions and docs, allow non-Windows builds by @pomianowski in #1196
• SystemThemeWatcher Documentation content changes by @bayeggex in #1200
• [getting-started.md] fixes for English grammar and flow by @glenn-slayden in #1210
• Perf: Exclude the unnecessary fields defined on a specific version by @textGamex in #1202
• Remove accidentally added characters by @Shavixinio in #1282
• Add support for .NET 9 by @pomianowski in #1287
• Disable NavigationViewContentPresenter refreshing from keyboard by @Nice3point in #1298
• Fix bug #1323 - add Margin to BulletDecorator to apply the CheckBox.Padding property by @JohnTasler in #1324
• AutoSuggestBox when using in a list will override the value of binded… by @nitheeshgovind in #1312
• fix: Clean-up NumberBox: focus repeat event-args debug-output cursor by @JohnTasler in #1328
• Update wpf-ui-cd-nuget.yaml for release branches by @pomianowski in #1329
• Invoke INavigationAware callbacks on UI thread by @elliot-gawthrop in #1307
• docs: section links by @guspan-tanadi in #1305
• Improve string comparison performance by @Nice3point in #1299
• Fix: ToggleButton interaction problem in SplitButton by @newtype0096 in #1297
• Fix button template/triggers by @Nice3point in #1296
• Fix typo in Gallery's radio button page by @xv in #1262
• Fix memory leak in ListView by @4nonym0us in #1243
• Defining a FontSize in a FontIcon should not be overridden by its VisualParent's by @Difegue in #1244
• Add hover brush to ListBoxItem by @Difegue in #1237
• Theming fixes by @Difegue in #1236
• Enhance DataGrid UI and Fix Style Issues by @stepwise-alan in #1192
• Fix screen reader issues with CardAction/Button/MenuItem/NavigationViewItem by @Difegue in #1235
• Fix elevationBrushes to match WinUI by @Difegue in #1234
• Fix hover behavior for CardControl by @Difegue in #1233
• Add support for setting content in place of the title in a TitleBar by @jonlipsky in #1030
• TitleBarPaneCompactMarginDefault set to 35 to prevent icon moving. by @AncientGrief in #1209
• ✨💄🐛 Add Snowflake Effect to the WPF UI Gallery by @keeleycenc in #1266

New Contributors

• @JakobFerdinand made their first contribution in #1186
• @bayeggex made their first contribution in #1200
• @glenn-slayden made their first contribution in #1210
• @Shavixinio made their first contribution in #1282
• @JohnTasler made their first contribution in #1324
• @nitheeshgovind made their first contribution in #1312
• @elliot-gawthrop made their first contribution in #1307
• @guspan-tanadi made their first contribution in #1305
• @newtype0096 made their first contribution in #1297
• @xv made their first contribution in #1262
• @4nonym0us made their first contribution in #1243
• @jonlipsky made their first contribution in #1030
• @AncientGrief made their first contribution in #1209
• @keeleycenc made their first contribution in #1266

Full Changelog: 3.0.5...4.0.0