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Avalonia.Remote.Protocol

12.1.419M downloads/moAvaloniaUI/Avalonia ↗New releases in your daily digest, changelog included.

Avalonia is a cross-platform UI framework for .NET providing a flexible styling system and supporting a wide range of Operating Systems such as Windows, Linux, macOS and with experimental support for Android, iOS and WebAssembly.

Last release 2 days ago
09 Oct 2026
Ships fairly regularly
a new release about every 2 weeks
Rarely documented
notes for 14 of the last 60 stable releases
3 versions withdrawn
withdrawn after publishing
127 years old
155 releases · first in 1900

Release timeline

155 releases since 1900

Releases

12.1.49 Oct 2026
Core – Make DiagnosticTextRenderer numbers monospace by @qwertychouskie in #21860
What's Changed

Enhancements

Core – Make DiagnosticTextRenderer numbers monospace by @qwertychouskie in #21860

Controls – Release the TextBlock text layout when the control is detached by @ronnycohen in #22281

Controls – Implement expand/collapse and invoke for MenuItem automation by @grokys in #22295

Windows – Gate per-monitor DPI on GetDpiForMonitor availability by @Davide244 in #22299

Wayland – Add AppId in WaylandPlatformOptions and WaylandProperties by @Whiletru3 in #22209

Fixes

Core – Fix showing ellipsis when word wrap and limited by height or MaxLines by @appel1 in #22025

Core – Stop radial gradients with a moved origin from hiding the background by @Evan260 in #22241

Core – Fix duplicate insertion of shared StyleInstance into the same ValueStore by @DamirLisak in #22276

Core – Fix bidi explicit formatting after reset by @George-Payne in #22288

Core – Revert "Fix StreamGeometry Clone and Open when a Transform is set (#22213)" by @MrJul in #22294

Core – Fix StreamGeometry Clone and Open when a Transform is set by @Evan260 in #22303

Core – Fix re-attaching a child visual cleared on detach by @Gillibald in #22334

Core – Return empty text bounds for zero-length ranges by @adirh3 in #22344

Core – Fix keyboard focus staying on a removed element when an overlay popup or flyout closes by @dariostrm in #22345

Core – Release detached visuals from a stopped CompositingRenderer by @NathanDrake2406 in #22369

Core – Fix RunIndex mapping in BidiReorderer by @niksedk in #22384

Core – Fix comments for PreciseArcTo by @robloo in #22402

Core – Fix Arc calculation and update ArcSegment comments by @robloo in #22404

Core – Fix ArgumentNullException in chrome hit test after window close by @AtakanUk in #22409

Controls – Report deselected items and batch SelectAll in TreeView by @Evan260 in #22172

Controls – Fix caret position with centered text by @chenjt2001 in #22340

Controls – Batch TextBox selection notifications during text replacement by @adirh3 in #22343

Controls – Invalidate Polygon/Polyline geometry when the points collection changes by @Gobidev in #22346

Controls – Hide text selection handles when text presenter visibility changes by @emmauss in #22348

Controls – Keep the CalendarDatePicker drop-down open when focus returns to it by @Evan260 in #22354

Controls – Apply IsSelected from items declared in XAML by @Evan260 in #22363

Controls – Keep the initial position of a Popup with pointer placement mode when its size changes by @emmauss in #22366

Controls – Fix Button and MenuItem leak when a style sets Command by @NathanDrake2406 in #22367

Controls – Update NativeMenuItem enabled state when CommandParameter changes by @NathanDrake2406 in #22368

Controls – Allow Shift+Tab out of CalendarDatePicker by @NathanDrake2406 in #22370

Controls – Do not measure TextBlock embedded controls during a render pass by @Gillibald in #22394

Controls – Fix support for HorizontalAlignment in ColorPicker by @robloo in #22401

Windows – Drive Win32 composition effects from RenderTargetSceneInfo on the render thread by @kekekeks in #22114

Windows – Read automation providers on the UI thread in Win32 automation by @Evan260 in #22237

Windows – Fix stale screen information in tray-only Win32 apps by @Cuptu in #22374

Linux – Expose heading and list metadata over AT-SPI by @glennawatson in #22383

Browser – Install dispatcher sync context in JS export callbacks by @kekekeks in #22293

Full Changelog: 12.1.3...12.1.4

From the same repository

AvaloniaUI/Avalonia

12.1.322 Sept 2026

Core – Handle DataValidationError notifications returned by ConvertBack by @Evan260 in #22171

What's Changed

Enhancements

Core – Handle DataValidationError notifications returned by ConvertBack by @Evan260 in #22171
Core – Make word segmentation linear in the length of a regional indicator run by @Gillibald in #22197
Core – Implement TopLevel.OpenedPopups by @maxkatz6 in #22074
Controls – Ignore child margins when positioning a popup by @MrJul in #21856
Controls – Add TableViewColumn.IsVisible property by @OleRoss in #22162
Windows – Support shell virtual files in drag and drop by @YoshihiroIto in #21907
Headless – Enable popups by @kekekeks in #21889
Headless – Use MouseDevice.Primary for consistency with desktop platforms in #22008
Headless – Add touch input simulation by @kekekeks in #22084

Fixes

Core – Cache synthetic/nearest glyph typefaces under the requested family name by @ronnycohen in #21993
Core – Fix AssemblyDescriptorResolver.GetAssembly to not throw CultureNotFoundException by @AhtenYa in #22137
Core – Match font family names case-insensitively by @Gillibald in #22163
Core – Fix SplineEasing constructor overwriting Y1 instead of setting Y2 by @Shirasagi0012 in #22169
Core – Short-circuit a null-conditional operator after a cast by @Evan260 in #22174
Core – Fix StreamGeometry Clone and Open when a Transform is set by @Evan260 in #22213
Core – Yield from dispatcher more eagerly during shutdown by @kekekeks in #22240
Controls – Make fullscreen reveal bar non-draggable by @massimopaganigh in #21548
Controls – Fix TrayIcon attachment lifecycle by @Linlccc in #22118
Controls – Rebuild TextBlock text runs only when the content changes by @Gillibald in #22149
Controls – Fix DateTimePickerPanel ItemHeight updates by @zrt2399 in #22158
Controls – Fix ListBox ghost items by @timunie in #22165
Controls – Fix CalendarDatePicker.Focus() not focusing the text box by @Evan260 in #22170
Controls – Measure the caret outside the text layout getter by @Gillibald in #22176
Controls – Fix crash when switching themes by @timunie in #22189
Controls – Keep the selection when right-clicking below the text in SelectableTextBlock by @Evan260 in #22212
XAML – Allow casting to a nested type in a binding path by @Evan260 in #22173
XAML – Run GenerateAvaloniaResources before _InjectAvaloniaAdditionalFiles by @Evan260 in #22175
Windows – Fix UIA selection never reaching the client by @grokys in #22151
Windows – Throw from BeginMoveDrag before posting the drag by @Evan260 in #22228
macOS – Fix accent color not respecting the current theme by @MrJul in #22143
macOS – Fix an issue when WindowTransparencyLevel is set to AcrylicBlur by @Linlccc in #22144
macOS – Dispose COM platform object on native app termination by @MrJul in #22200
macOS – Make sure child window layer is not lower than parent window by @maxkatz6 in #22221
X11 – Fix LeaveWindow not raised with software rendering by @MrJul in #22120
X11 – Send a synthetic UnmapNotify when hiding a window by @liu-xindi in #22135
X11 – Fix use-after-free from non-idempotent SmcCloseConnection by @hartmark in #22190
X11 – Fix default window size being scaled twice on HiDPI screens by @grokys in #22255
Wayland – Fix scroll axis units by @George-Payne in #22207
Wayland – Properly report desktop scaling as 1 by @kekekeks in #22245
Wayland – Don't set O_NONBLOCK on Pipe2Stream unconditionally by @MrJul in #22248
Linux – Fix duplicated and crashing DBus tray icon by @bolikcraft in #21980
Browser – Fix undisposed PointerEvent JSObject on pointer move by @appel1 in #22112
Headless – Fix headless session startup and disposal races by @PrzemyslawKlys in #22222

Full Changelog: 12.1.2...12.1.3

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12.1.3

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12.1.22 Sept 2026

Core – Preserve current Animation progress if SpeedRatio or PlaybackDirection changes by @timiimit-tam in #19830

What's Changed

Enhancements

Core – Preserve current Animation progress if SpeedRatio or PlaybackDirection changes by @timiimit-tam in #19830
Core – Add TextInputOptions.HintLocales by @kerams in #21528
Controls – Implement VerticalContentAlignment for DatePicker and TimePicker by @JoaoMSSCruz in #21464
Controls – Add :empty pseudoclass for ContentControl by @zrt2399 in #21829
Controls – Propagate Popup.IsHitTestVisible to IPopupImpl to skip hit-testing popups on the OS level if available by @kekekeks in #21916
Controls – Add Content attribute to ContentPresenter by @zrt2399 in #21997
Controls – Don't build the selected text just to check whether a selection exists by @NathanDrake2406 in #22100
macOS – Enable picking .app-packages as a folder by @jakobhellermann in #21925
Linux – Select a KMS-capable DRM card automatically by @Illustar0 in #21923
Android – Support TextInputOptions.IsSensitive and ContentType Pin by @dariostrm in #22110
iOS – Implement VoiceOver support by @IsaMorphic in #18016

Fixes

Core – Fix GeometryBuilder.DrawRoundedCornersRectangle for Rect by @robloo in #21482
Core – Fix Vulkan image layout in GPU interop by @nateglasser in #21787
Core – Fix ServerCompositionDrawingSurface orphaning GPU snapshots when an update is processed after Dispose by @ddunham121 in #21876
Core – Fix Loaded event processing after a handler throws by @NathanDrake2406 in #21877
Core – Keep transform playback in sync when hidden by @NathanDrake2406 in #21896
Core – Fix vector geometry anti-aliasing regression by making stencil buffers opt-in by @NathanDrake2406 in #21899
Core – Fix AccessKeyHandler when no descendant control has focus by @AutumnYuanc in #21920
Core – Ensure that ActualThemeVariant always has a proper value by @MrJul in #21930
Core – Fix init order of SetupWithClassicDesktopLifetime by @MrJul in #21954
Core – Raise TopLevel.Closed from managed Dispose paths by @kekekeks in #22045
Core – Ignore default ignorable codepoints in font fallback by @Gillibald in #22059
Core – Justify word gaps that fall on a run boundary by @Gillibald in #22065
Core – Snap a right-to-left buffer split to the cluster boundary by @Gillibald in #22066
Core – Do not shape the space after fallback text with the fallback font by @Gillibald in #22067
Core – Use effective capturer (which can be recognizer) for PlatformCapture by @kekekeks in #22076
Core – Short-circuit the binding chain on a null-conditional operator by @grokys in #22082
Core – Fix dispatcher frame capturing wrong dispatcher by @kekekeks in #22086
Core – Fix memory leak when binding to observables by @grokys in #22097
Core – Fix data validation errors not showing for OneWayToSource bindings by @grokys in #22103
Core – Fix focus being locked when restoring focus to a control that's detached from the visual tree by @emmauss in #22113
Core – Fix infinite loop when a text run shapes to no glyphs by @Gillibald in #22119
Controls – Fix SelectableTextBlock selection for centered and right-aligned text by @zrt2399 in #21369
Controls – Use large scroll events for ScrollBar's ScrollToHome and ScrollToEnd by @zrt2399 in #21748
Controls – Hide cached focused items in VirtualizingStackPanel by @NathanDrake2406 in #21835
Controls – Set the LogicalParent of the TableViewColumn by @OleRoss in #21840
Controls – Disconnect template descendants hosted inside Viewbox when the template changes by @NathanDrake2406 in #21879
Controls – Fix SelectableTextBlock selection when text content changes by @zrt2399 in #21894
Controls – Fix TreeViewItem.BringIntoView by @MrJul in #21918
Controls – Use ItemTemplate for ComboBox's selection box for controls by @MrJul in #21937
Controls – Fix WrapPanel layout jitter with LineSpacing by @zrt2399 in #21942
Controls – Fix tooltip flickering by @MrJul in #21965
Controls – Fix VirtualizingStackPanel offset when scrolling to variable-sized items by @zrt2399 in #21975
Controls – Update TabbedPage.xaml color resources by @smaicas in #21994
Controls – Fix multiple ScrollContentPresenter.BringDescendantIntoView calls by @MrJul in #22001
Controls – Fix icon not rendered for CalendarDatePicker in some cases by @timunie in #22012
Controls – Fix VirtualizingStackPanel ScrollToEnd with variable-sized items by @zrt2399 in #22014
Controls – Fix TextBlock ellipsis not showing with TextWrapping and MaxLines by @puk06 in #22017
Controls – Show the RefreshContainer refresh indicator when refresh is triggered programmatically by @emmauss in #22020
Controls – Fix DatePicker and TimePicker separator alignment with VerticalContentAlignment by @zrt2399 in #22023
Controls – Invalidate image measure when DrawingImage source invalidates by @emmauss in #22028
Controls – Fix light dismiss behavior when opened from the ContextMenu by @Linlccc in #22037
Controls – Handle clipboard exceptions in TextBox/SelectableTextBlock by @MrJul in #22052
Controls – Revert "Stop HotKeyManager from triggering on hidden controls" by @grokys in #22071
Controls – Fix auto-sized VirtualizingStackPanel not rendering by @MrJul in #22081
Controls – Fix crash when changing source during SelectionChanged by @grokys in #22102
Windows – Drop dead WM_POINTERDEVICEINRANGE/WM_POINTERDEVICEOUTOFRANGE handling by @kekekeks in #22046
Windows – Fix pointer capture cancellation by @kekekeks in #22054
Windows – Fix hidden TrayIcon appearing after icon updates by @Linlccc in #22125
macOS – Keep window creation on-screen during display reconfiguration by @brianwphamSF in #21543
macOS – Fix NSTextInputClient range handling and null dereference issues by @Gillibald in #21885
macOS – Open a submenu when its parent menu item is clicked by @AntonZelinsky in #21890
macOS – Fix keyDown event handling for input methods by @Gillibald in #21906
macOS – Use NSTrackingInVisibleRect for mouse movement tracking by @drasticactions in #21996
macOS – Prevent title bar flash on fullscreen exit by @Illustar0 in #22101
X11 – Fix AVALONIA_SCREEN_SCALE_FACTORS handling by @lindexi in #22129
Wayland – Handle (0,0) surface size by @MrJul in #21863
Linux – Fix wrong escaping on xdg-open by @ReinaS-64892 in #21936
Linux – Free native DRM resources after enumeration by @Illustar0 in #21924
Android – Fix multiline TextBox caret staying on previous line after autocorrect + Enter by @Zeljko-Predjeskovic in #21900
Android – Fix TryGetFileFromPathAsync/TryGetFolderFromPathAsync returning null for content:// URI by @lfeng1420 in #21986
Android – Unregister automation peers when their control leaves the visual tree by @ronnycohen in #22024
Android – Fix crash on a stale accessibility virtual view id by @ronnycohen in #22122
Android – Don't walk an InteropAutomationPeer during accessibility traversal by @ronnycohen in #22123
iOS – Fix issue with creating files under app container Documents directory by @KijongHan in #22031
Browser – Fix BrowserDispatcherImpl never setting _signaled flag by @appel1 in #22093

Full Changelog: 12.1.1...12.1.2

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12.1.2

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12.1.129 Jul 2026

Controls – Add ToolTip.ShouldUseOverlayLayer attached property by @rabbitism in #21830

What's Changed

Enhancements

Controls – Add ToolTip.ShouldUseOverlayLayer attached property by @rabbitism in #21830
XAML – Allow single parameter with any type when binding to a method by @MrJul in #21867
Wayland – Add UseWaylandWithFallback by @kekekeks in #21734
Android – Expose AutomationId as resource-id for Android automation by @stevemonaco in #21780

Fixes

Core – Fix Dispatcher.ReplaceImplementation by @kekekeks in #21735
Core – Reapply cached binding source values during UpdateTarget by @NathanDrake2406 in #21756
Core – Fix custom-hit-test optimization by @kekekeks in #21769
Core – Detach platform input when presentation source closes by @NathanDrake2406 in #21782
Core – Fix line break enumerator infinite loop by @rabbitism in #21808
Core – Fix EGL surface recreation after native handle changes by @AB901 in #21816
Core – Fix stale _usedCache value that wasn't reset properly in compositor by @kekekeks in #21823
Core – Properly wire CompositionInterop.IsLost by @kekekeks in #21824
Core – Preserve lines at rounded fractional heights by @NathanDrake2406 in #21834
Controls – Correct nested TreeViewItem selection behaviour on pointer release by @TomEdwardsEnscape in #21705
Controls – Fix some issues on SelectingItemsControls when items or control changes visibility by @timunie in #20798
Controls – Stop HotKeyManager from triggering on hidden controls (#21708) by @1419323749 in #21714
Controls – Fix SplitView stealing BackRequested when its pane is closed (#21740) by @gentledepp in #21741
Controls – Fix CommandBar secondary visibility during overflow open by @NathanDrake2406 in #21742
Controls – Fix AutoCompleteBox popup not closing on focus lost by @MrJul in #21749
Controls – Position popup using the screen containing the anchor point by @MrJul in #21750
Controls – Keep page in NavigationPage's logical tree until animation is complete by @MrJul in #21751
Controls – Fix SimpleTheme focus adorner contrast in dark mode by @iamvalenciia in #21753
Controls – Fix ComboBox dropdown not scrolling to selected item when opened by @zrt2399 in #21764
Controls – Allow Grid shared size groups to shrink by @NathanDrake2406 in #21837
Controls – Fix ListBox crash when scrolling after item removal by @NathanDrake2406 in #21838
Controls – Clear TextBox undo history on external text updates by @NathanDrake2406 in #21839
Controls – Register Grid assigned definition collections with their shared size group by @NathanDrake2406 in #21848
Controls – Initialize TextBox command states in constructor by @zrt2399 in #21859
Controls – Fix infinite loop in tab stop search with TabNavigation=Once by @maggch97 in #21864
Controls – Handle Padding correctly in ScrollContentPresenter by @MrJul in #21872
XAML – Respect disabled Avalonia name generator by @mklts in #21804
XAML – Support {Binding ^} pattern for IObservable DataContext by @rabbitism in #21812
Windows – Fix Vulkan popup transparency by @the-bla in #21802
macOS – Fix IME preedit lost on focus change by @hyunq21 in #21601
macOS – Fix off-thread accessibility hit-test crash by @VicChelaru in #21779
macOS – Fix app activation by @JakobScholer in #21799
X11 – Fix active window tracking by @kekekeks in #21846
X11/Wayland – Fix DBusPlatformSettings NullReferenceException by @pos777 in #21831
Wayland – Report disposed WaylandEglWsiSurface render target by @MrJul in #21857
Wayland – Destroy transient framebuffer SHM pools by @jmacato in #21870
Android – Fix multiline TextBox IME offsets by @AlexSCcon in #21680
iOS – Block external roles from activating UIScene by @drasticactions in #21844
Headless – Fix headless session hang when cleanup throws by @NathanDrake2406 in #21781

Full Changelog: 12.1.0...12.1.1

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12.1.1

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12.1.09 Jul 2026

Read our release blog post for more information about new features in Avalonia 12.1.0!

General

Read our release blog post for more information about new features in Avalonia 12.1.0!

What's Changed

Enhancements

Core – Allow setting ThemeVariant to Default to reset theme to system on android by @emmauss in #16340
Core – Allow Dispatcher to be converted to a TaskScheduler by @TomEdwardsEnscape in #21032
Core – Remove obsolete int32 limit on DispatcherTimer.Interval by @TomEdwardsEnscape in #21113
Core – Bump MicroCOM and use source generators by @maxkatz6 in #21218
Core – Improve composition hit testing performance with per-visual AABBs by @hez2010 in #21310
Core – Tests/render data drawing context coverage by @ZehMatt in #21341
Core – Align Touch/Pen capture semantics with Mouse (#21325) by @miloush in #21363
Core – Refactor per-draw render data allocations with a binary opcode stream by @ZehMatt in #21366
Core – Allow attaching a platform-specific event cookie to platform events by @kekekeks in #21378
Core – Pass original logical size to render targets by @kekekeks in #21380
Core – Pass shadow extents to the platform by @kekekeks in #21385
Core – A bit better handling of gpu context loss by @kekekeks in #21387
Core – Platform event to toggle drawn decorations state by @kekekeks in #21388
Core – Use eglGetProcAddress instead of NativeLibrary.TryGetExport by @kekekeks in #21392
Core – Support desktop OpenGL profiles via EGL by @kekekeks in #21393
Core – Implement IStorageProvider.OpenFileWithResultAsync by @MrJul in #21418
Core – Implement Bitmap.Save with a format by @MrJul in #21455
Core – Disable region dirty rect clipping by default by @MrJul in #21553
Core – Enable stencil buffers by default + add configurable option by @MrJul in #21586
Core – avoid SKBitmap.Copy when creating ImmutableBitmap from pixels by @kekekeks in #21675
Core – Generate a CycloneDX SBOM per published NuGet package by @grokys in #21681
Core – Composition-aware geometries and drawing change detection by @MrJul in #21682
Controls – Improve pull-to-refresh usability in RefreshContainer by @gentledepp in #18617
Controls – Add Scrollbar Context Menu by @drasticactions in #19413
Controls – Add custom CalendarDatePicker date parsing to allow for multiple user input formats by @Deadpikle in #21193
Controls – Implement TableView by @MrJul in #21511
Controls – Show checkerboard background for transparent ColorView palette items by @Jaex in #21613
Controls – Allow copying and cutting revealed TextBox passwords by @zrt2399 in #21710
Windows – Optimize rendering performance by reducing premultiplied AlphaMode by @lindexi in #20757
Windows – Create Avalonia.WinUI for initial WinUI embed support by @drasticactions in #21430
Windows – Implement Win32Properties.WindowCornerPreference by @MrJul in #21615
Windows – Support rendering at max refresh rate of current displays by @emmauss in #21643
Windows – Let GraphicsAdapterSelectionCallback see unfiltered adapters and warn on Adreno WARP fallback by @nickna in #21695
X11 – Implement automatic fps detection by @kekekeks in #18558
X11 – Implement XDND: drag-and-drop support for Linux by @MrJul in #20926
X11/Wayland – Update to latest Tmds.DBus.Protocol by @tmds in #21472
X11/Wayland – Better platform window handle abstraction for DBusSystemDialog by @kekekeks in #21379
X11/Wayland – Introduce cross-thread support for AutomaticRawEventGrouperDispatchQueue by @kekekeks in #21386
X11/Wayland – Workarounds for NVIDIA EGL drivers by @kekekeks in #21590
Wayland – Wayland-specific handling for platform surface readiness by @kekekeks in #21382
Wayland – Roslyn generator for generating cross-thread call proxies by @kekekeks in #21384
Wayland – Wayland protocol support by @kekekeks in #21448
Wayland – Added GLib event loop support to wayland backend by @kekekeks in #21669
Android/iOS – Add platform feedback api for sound and haptic feedback by @emmauss in #21189
Android – Use BCL storage for TryGet api by @emmauss in #21641

Fixes

Core – Remove dead code in AvaloniaObject by @grokys in #21452
Core – Fix text selection brush not applying when text selection changes by @emmauss in #21480
Core – Fix RequestedThemeVariant default value by @MrJul in #21624
Core – Rework text fallback itemization by @Gillibald in #21631
Core – InterWordJustification fixes by @Gillibald in #21701
Core – Fix BclLauncher.Exec throwing instead of returning false by @Misaka-L in #21704
Controls – Return false by default from FocusManager.CanHaveFocusableChildren by @freddiesmartbox in #21640
Controls – Fix SelectableTextBlock selection offset with InlineUIContainer by @JoshuaRowePhantom in #21646
Controls – Fix PART_OnContentPresenter name typo in ToggleSwitch by @zrt2399 in #21728
XAML – Compiled Bindings: Fix unpredictable binding to method selection by @maxkatz6 in #21617
XAML – Don't include non-text files in Roslyn's AdditionalFiles by @maxkatz6 in #21729
Windows – Fix TopMost handling for Popups by @StefanKoell in #17841
Windows – Support decimal in automation ComVariant (fixes NumericUpDown crash under UIA) by @valentino-saitz-optris in #21634
Windows – Respect IME preedit cursor position by @gotoh in #21632
Windows – Align ExpandCollapseState member order with UIA by @jmacato in #21693
Windows – Fix working area changed won't update screen by @Misaka-L in #21707
Windows – Fix empty automation bounds for custom root providers by @jmacato in #21730
X11 – Fix mishandled cancellation in DBusTextInputMethodBase by @deryaza in #21527
X11 – Re-read _NET_WORKAREA on WM PropertyNotify by @lambgoesbaa in #21651
X11 – Fix XEmbed client by @kekekeks in #21677
Android – TalkBack should still respond to all hover events by @IsaMorphic in #21644
Android – TalkBack should highlight controls instead of their ancestors by @IsaMorphic in #21654
Android – Fix crash populating accessibility node for some peers by @mikegoatly in #21726
Android – Fix AvaloniaView double root creation by @MrJul in #21738
Browser – Fix typo: verityPermissions -> verifyPermissions by @Frederisk in #21281
Headless – Fix hang if exception is thrown during headless session app construction by @ThadHouse in #21688

Misc

Samples – Update ControlCatalog to use the Page system by @emmauss in #21044
Samples – Fix OpenGL Lease page not showing in ControlCatalog by @MrJul in #21198
Samples – Improve ControlCatalog sidebar search by @jsuarezruiz in #21236
Samples – ControlCatalog: improve transparent appearance by @MrJul in #21441
Infra – Reset API suppressions by @MrJul in #21106
Infra – update .gitignore for left over generated files, and VS Code C# Dev Kit *.lscache by @Shirasagi0012 in #21228
Infra – Link to integration tests readme by @miloush in #21329
Infra – Adjust build instructions by @MrJul in #21397

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12.1.0

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12.0.523 Jun 2026

Core – Implement Unicode word segmentation and update to Unicode v17 by @JimBobSquarePants in #21361

What's Changed

Enhancements

Core – Implement Unicode word segmentation and update to Unicode v17 by @JimBobSquarePants in #21361
Core – Unicode and text layout optimizations by @Gillibald in #21400
Core – Expose Calendar day button selection state to automation by @jmacato in #21540
Core – Expose menu item toggle state to automation by @jmacato in #21541
Core – Support Value pattern on editable ComboBox automation peer by @jmacato in #21545
XAML – Enhance Roslyn-compiler visible metadata by @maxkatz6 in #21546
Windows – Fall back to pixel location when GetPointerDeviceRects is unavailable by @Symbai in #21337
macOS – Add AX BringIntoView/AXScrollArea role by @jmacato in #21457
macOS – Synchronize Metal drawable presentation by @drasticactions in #21588
macOS – Expose ScrollViewer scroll bars to accessibility by @jmacato in #21596
macOS – Report read-only value state to accessibility by @jmacato in #21597
macOS – Expose tree item selection to accessibility by @jmacato in #21598
X11 – Expose placeholder text as the AT-SPI placeholder-text attribute by @jmacato in #21554
Android – Add support for hover events on android by @emmauss in #21551
Headless – Add sleep timer option by @maxkatz6 in #21423

Fixes

Core – Fix culture aware font matching by @Gillibald in #21435
Core – Fix TextCollapsingProperties bidirectional-text (BiDi) correctness by @Gillibald in #21446
Core – Fix NotificationCard pseudo class state when NotificationType changes by @zrt2399 in #21490
Core – Apply placeholder opacity to combobox placeholder textblock by @emmauss in #21493
Core – Fix radio button disabled fill and stroke brushes by @emmauss in #21495
Core – Listen to layout changes for ancestor visuals in text selection canvas by @emmauss in #21536
Core – Fix caption button background in dark mode by @MrJul in #21555
Core – Fix system font caching when retrieved with a different name by @MrJul in #21557
Core – Fix StackOverflow when a NaN offset is set on ScrollViewer by @NicholasLachapelle in #21558
Core – Avoid read-only editing side effects in TextBox keyboard handlers by @zrt2399 in #21587
Core – Fix TimePicker selection style by @shine1258 in #21626
Core – Suppress culture flowing with ExecutionContext captured by DispatcherOperation by @kekekeks in #21627
XAML – Fix some AOT warnings by @maxkatz6 in #21616
XAML – Fix typo in key assignment for reference assembly by @collindang88 in #21474
Windows – Fix window animations in extended mode by @MrJul in #21498
Windows – Fix WinUiCompositorConnection deadlock by @MrJul in #21591
macOS – Map ListItem accessibility peer to AXRow by @jmacato in #21537
macOS – Fix AXLayoutChanged notifications dropped for template-internal peers by @jmacato in #21595
macOS – Fix accessibility read-only, selection, and expand/collapse actions by @jmacato in #21599
macOS – Handle replacementRange in AvnView by @MrJul in #21608
X11 – Fix BorderOnly window resizing by @ruddypp in #21579
X11 – Fix ClipboardUriListHelper not flushing by @MrJul in #21589
X11 – AT-SPI: SelectChild should add to the selection instead of replacing it by @jmacato in #21602
X11 – AT-SPI: Expose list item containers as accessible children by @jmacato in #21605
X11 – Fix invisible window when un-minimizing by @MrJul in #21614
Android – Fix AndroidStorage.TryGetFile/FolderFromPathAsync returning null or throwing by @MrJul in #21628
Browser – Fix file picker crashing while listing entries of folders by @emmauss in #21449
Browser – Ensure sync context is set before running dispatcher messages by @emmauss in #21462
Browser – Fix Firefox drag-and-drop: handle effectAllowed=uninitialized by @Der-Floh in #21486
Browser – Check permissions before reading or writing to clipboard by @emmauss in #21573

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12.0.428 May 2026

Core – Bump ANGLE version + sign native binaries by @maxkatz6 in #21219

What's Changed

Enhancements

Core – Bump ANGLE version + sign native binaries by @maxkatz6 in #21219
Core – Update XML documentation to reflect correct type references in Avalonia.Controls project by @rabbitism in #21283
Core – Add missing AutomationPeers from built-in Controls by @jmacato in #21322
Core – Align Touch/Pen capture semantics with Mouse by @miloush in #21325
Core – Fire property-changed events when AutomationId changes at runtime by @dimension-zero in #21374
Core – Update SkiaSharp to 3.119.4 by @MrJul in #21434
macOS – Add accessibility events for expand & collapse events by @codecat in #21043

Performance

Core – Implement TextRunCache by @Gillibald in #21030
XAML – Improve type caching in the XAML compiler by @MrJul in #21408

Fixes

Core – Fix CommandBar overflow labels when label position is collapsed by @jsuarezruiz in #21226
Core – Fix RenderTargetBitmap losing effects by @timunie in #20790
Core – Fix SelectionChanged not raised on collection reset by @NathanDrake2406 in #20942
Core – Ensure system back event is passed to child page once by @emmauss in #21246
Core – Make sure TryGetGlyphTypeface does not fail for concurrent access by @Gillibald in #21269
Core – Avoid exceptions when getting a position from a PointerEventArgs by @TomEdwardsEnscape in #21301
Core – Make text in NumericUpDown update immediately when changing the TextConverter by @cdytoby in #21320
Core – Fixes double reorder of cached bidi runs by @Gillibald in #21351
Core – Set WindowDrawnDecorations background to transparent by @ent3m in #21354
Core – Fix radio MenuItem grouping in MenuFlyout by @zrt2399 in #21356
Core – Fix popup positioning anchor rect bug with drawn window decorations by @kekekeks in #21383
Core – Make cursor respect the captured element by @MrJul in #21421
Core — Add a resource for title bar background by @MrJul in #21440
XAML – Fix compiled binding DataContext inference in ItemTemplate by @JoaoMSSCruz in #21248
Windows – Run file picker on dedicated STA thread to avoid MTA deadlock by @ZehMatt in #21266
Windows – Fix borders and shadows on Windows 10 in extended mode by @MrJul in #21412
Windows – Include border size in GetMinMax request by @emmauss in #21420
Windows – Fix UIA tree not visible for Avalonia content embedded via WinFormsAvaloniaControlHost by @AndreyPolovodov in #21422
macOS – Fix DeviceLuid byte ordering on GPU interop by @dirivero in #21293
X11 – Observe potential DBus exception in UnregisterWindowAsync by @holdxen in #21344
X11 – Update Avalonia.DBus submodule by @jmacato in #21419
Android – Fix File properties by @emmauss in #21307
Android – Correct usage of PointToScreen for Android TalkBack by @IsaMorphic in #21402
iOS – Drain UISceneConnectionOptions on cold launch by @koblavi in #21394
Headless – Fix xUnit headless tests losing TestContext on background thread by @mikegoatly in #21357

Full Changelog: 12.0.3...12.0.4

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