microsoft/microsoft-ui-xaml

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WinUI: a modern UI framework with a rich set of controls and styles to build dynamic and high-performing Windows applications.

Stars: 8.4k
Forks: 942
Open beginner issues: 8
Indexed issues: 2.2k
Avg merge: 2d 7h
Merged PRs (30d): 105

Dominant language: C++
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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2,188 open issues indexed

TitleBar with IconSource resets the mouse cursor to the arrow on every layout pass Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11942 · Opened Sep 18, 2026
Title bar is messed up in window preview when minimized Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11941 · Opened Sep 18, 2026
NavigationView: Moving selected item between groups leaves IsChildSelected=true on former ancestors Open

area-NavigationView bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 76/100

microsoft/microsoft-ui-xaml#11927 · Opened Sep 17, 2026
Proposal: no any AI-oriented components Open

feature proposal needs-triage

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/microsoft-ui-xaml#11924 · 1 comment · 2 reactions · Opened Sep 17, 2026
Setting Opacity to ProfilePicture incorrectly displays initials behind the picture Open

area-PersonPicture bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 58/100

microsoft/microsoft-ui-xaml#11922 · 1 comment · 3 reactions · Opened Sep 16, 2026
Proposal: Expose a custom Page activator for Frame navigation Open

area-Navigation feature proposal team-Controls

Difficulty 5/5 Over a week Newbie friendliness 42/100

microsoft/microsoft-ui-xaml#11915 · 1 comment · 3 reactions · Opened Sep 16, 2026
WinUI 3 lifted Composition still uses the legacy FXC/DXBC shader pipeline and does not support DXC, Shader Model 6.9, DXIL, or D3D12U Open

area-Animations bug team-Core

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/microsoft-ui-xaml#11902 · 3 comments · Opened Sep 15, 2026
FlowLayout: Rapid wheel scrolling variable-sized ItemsRepeater causes layout-cycle crash Open

area-Layouts bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11888 · Opened Sep 15, 2026
MenuBar: Left/Right arrow navigation gets stuck around submenus Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/microsoft-ui-xaml#11886 · Opened Sep 14, 2026
Different custom enum boxing behavior in C++ and C# Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11885 · Opened Sep 14, 2026
ItemsView crashes with E_INVALIDARG when a pending bring-into-view target is collapsed Open

area-ItemsView area-Scrolling bug

microsoft/microsoft-ui-xaml#11865 · 2 comments · 1 assignee · Opened Sep 12, 2026
TextBox: Double-clicking the empty area after text does not select the closest word Open

area-TextBox bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/microsoft-ui-xaml#11856 · 1 reaction · Opened Sep 11, 2026
Microsoft.UI.Xaml.Markup.Compiler.Executable uses the localized language instead of English when generating cs files Open

area-Localization area-XamlCompiler bug team-Core

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/microsoft-ui-xaml#11843 · Opened Sep 11, 2026
Proposal: Remove the macro XAML_TYPE_INFO_INC Open

area-XamlCompiler feature proposal needs-triage

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

microsoft/microsoft-ui-xaml#11842 · Opened Sep 11, 2026
Fix XamlCompiler tests Open

area-XamlCompiler team-Core

microsoft/microsoft-ui-xaml#11835 · 1 assignee · Opened Sep 9, 2026
Can’t build due to 7.0 TargetFrameworkVersion Open

bug needs-triage

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

microsoft/microsoft-ui-xaml#11834 · Opened Sep 9, 2026
WebView2 control fails to load content in WinUI SampleBrowser Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/microsoft-ui-xaml#11832 · 1 comment · Opened Sep 9, 2026
Proposal: Add C++/WinRT support for x:Property Open

area-XamlCompiler feature proposal team-Core team-Markup

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/microsoft-ui-xaml#11825 · Opened Sep 9, 2026
Lifted Microsoft.UI.Composition still rejects custom/D2D effects while MUC also lacks Visual-to-GPU interop Open

bug needs-triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/microsoft-ui-xaml#11813 · 1 comment · Opened Sep 7, 2026
Why are WinUI types such as GridLength and RepeatBehavior (possibly others) marked as TypeInfo_Flags_IsSystemType in C++/WinRT XamlTypeInfo, causing C++ components to fail when consumed from C#? Open

area-XamlCompiler bug team-Core team-Markup

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/microsoft-ui-xaml#11812 · 2 comments · Opened Sep 7, 2026
DirectUI.DirectUISchemaContext Open

area-XamlCompiler bug needs-author-feedback needs-repro team-Core team-Markup

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

microsoft/microsoft-ui-xaml#11808 · 1 comment · Opened Sep 7, 2026
Proposal: Add dark mode for window caption button tooltip Open

area-TitleBar area-Windowing feature proposal team-Core

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11802 · 10 comments · 2 reactions · Opened Sep 6, 2026
FlipView can unload an element multiple times Open

area-Lists bug team-Controls

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11800 · Opened Sep 6, 2026
Are msyh.ttc, YuGothM.ttc, YuGothR.ttc, consola.ttf, and arial.ttf open-source? Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/microsoft-ui-xaml#11796 · Opened Sep 5, 2026
Stable API for programmatic DataTemplate Open

area-Binding team-Core team-Markup

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/microsoft-ui-xaml#11794 · Opened Sep 4, 2026
Add missing Windows XAML components to the WinUI Visual Studio configuration Open

area-Infrastructure needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11774 · Opened Sep 3, 2026
Remove the VS 2022 setup flow and standardize WinUI setup on VS 2026 Open

area-Infrastructure documentation

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11773 · Opened Sep 3, 2026
Leaving high contrast can leave app display a bunch of red instead of accurate colors Open

area-Resources bug team-Core team-Reach

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11768 · 1 comment · Opened Sep 2, 2026
Proposal: SetBinding with a lambda Open

area-Binding feature proposal team-Core

microsoft/microsoft-ui-xaml#11755 · 1 assignee · Opened Sep 1, 2026
Stable API for FrameworkElement.SetThemeResourceBinding Open

area-Resources team-Core

microsoft/microsoft-ui-xaml#11753 · 2 reactions · 1 assignee · Opened Sep 1, 2026
AutoSuggestBox incorrect rounded corners after changing popup placement Open

area-AutoSuggestBox bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11750 · 1 reaction · Opened Sep 1, 2026
BitmapSource async action lifetime leak Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

microsoft/microsoft-ui-xaml#11742 · 3 comments · Opened Sep 1, 2026
Proposal: Provide an API enable applications to request for the XAML graphics device to be released Open

area-Lifetime feature proposal needs-triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/microsoft-ui-xaml#11741 · 2 comments · Opened Sep 1, 2026
NavigationView pane and list states become inconsistent when maximizing with an overlay pane open Open

area-NavigationView bug team-Controls

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/microsoft-ui-xaml#11740 · Opened Sep 1, 2026
TimePicker and DatePicker should honor explicit Width and Height on their visible selector controls Open

area-DateTimePickers needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 72/100

microsoft/microsoft-ui-xaml#11737 · Opened Sep 1, 2026
ItemsRepeater can recycle elements from a replaced DataTemplate into the new template’s pool Open

area-ItemsRepeater bug team-Controls

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/microsoft-ui-xaml#11727 · 1 reaction · Opened Aug 31, 2026
[WinUI OSS] Good to have issues for OSS Open

needs-triage WinUI OSS

microsoft/microsoft-ui-xaml#11725 · 1 assignee · Opened Aug 31, 2026
Could not bind nullabel Guid with `Binding` in attached properties Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/microsoft-ui-xaml#11721 · Opened Aug 31, 2026
ProgressBar strange animation when value decreases Open

area-Progress bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 66/100

microsoft/microsoft-ui-xaml#11705 · 4 reactions · Opened Aug 30, 2026
Proposal: [WinUI-BuildSampleApps] Optimize pipeline conditions and add error handling in NuGet source script Open

area-Infrastructure feature proposal needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 64/100

microsoft/microsoft-ui-xaml#11701 · Opened Aug 29, 2026
_Status updated on August 28th, 2026: (✅ - Done | ⌛ - In Progress | ⏭️ - Planned)_ Open

needs-triage

Difficulty 5/5 Over a week Newbie friendliness 10/100

microsoft/microsoft-ui-xaml#11697 · 6 reactions · Opened Aug 29, 2026
Can't build using documented steps; `init.cmd` throws a bunch of errors Open

bug needs-triage

microsoft/microsoft-ui-xaml#11696 · 6 comments · 1 assignee · Opened Aug 28, 2026
System.Runtime.InteropServices.COMException occurs when both DisplayMemberPath and ItemTemplate are set Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 40/100

microsoft/microsoft-ui-xaml#11693 · Opened Aug 28, 2026
[WinUI OSS] Enable Fork PR Validations Open

needs-triage WinUI OSS

microsoft/microsoft-ui-xaml#11685 · 1 assignee · Opened Aug 28, 2026
[WinUI OSS] Infrastructure Issues Tracking Items Open

needs-triage WinUI OSS

microsoft/microsoft-ui-xaml#11681 · 1 assignee · Opened Aug 28, 2026
Proposal: smooth launch, don't show a Xaml Window until the first frame is rendered Open

area-XamlWindow needs-triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/microsoft-ui-xaml#11677 · 1 comment · 20 reactions · Opened Aug 27, 2026
Expander animation glitch the first time it expands Open

area-Expander bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/microsoft-ui-xaml#11661 · 1 comment · 1 reaction · Opened Aug 26, 2026
ScrollView ignores one axis of center point if animationis disabled Open

area-Scrolling bug team-Controls

Difficulty 3/5 1-2 days Newbie friendliness 65/100

microsoft/microsoft-ui-xaml#11650 · Opened Aug 25, 2026
WinUI Key event does not correctly recognize French keyboard special characters Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/microsoft-ui-xaml#11649 · 3 comments · Opened Aug 25, 2026
Fail fast crash from Microsoft.InputStateManager.dll, seems related to touchpad input Open

area-Pointer bug team-CompInput

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/microsoft-ui-xaml#11676 · 1 comment · Opened Aug 25, 2026

microsoft/microsoft-ui-xaml

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