dotnet/winforms

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Windows Forms is a .NET UI framework for building Windows desktop applications.

Stars: 4.9k
Forks: 1.1k
Open beginner issues: 0
Indexed issues: 786
Avg merge: 19h 33m
Merged PRs (30d): 112

Dominant language: C#
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Open All

784 open issues indexed

System.Drawing: Graphics.DrawRoundedRectangle / FillRoundedRectangle produce anti-aliased corner artifacts Open

dotnet/winforms#14804 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`RichTextBox` reports line positions for text removed while the form was minimized, and paints garbled rows after the restore Open

untriaged

dotnet/winforms#14830 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Control.Dispose leaves ScaledControlFont referencing a disposed Font, making Control.Font throw after disposal Open

dotnet/winforms#14839 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
.NET 11 animation stack: renderers keep running and can be resurrected after control disposal Open

dotnet/winforms#14840 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Track WinForms breaking changes for agent-driven modernization/migration (prototyping & warning) Open

dotnet/winforms#14862 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
CheckBox and RadioButton ignore BackColor and ForeColor when Appearance=Button in Dark Mode Open

area-DarkMode untriaged

dotnet/winforms#14866 · 1 comment · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Race condition in ImageCodecInfoHelper Open

untriaged

dotnet/winforms#14884 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
The dot line appeared entire control for the checkbox/radiobutton when setting the Appearance as ToggleSwitch in Net11 Open

NewApi-Net11 waiting-on-team

dotnet/winforms#14886 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
System.Drawing.Common package omits required System.Formats.Nrbf dependency Open

dotnet/winforms#14890 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Tracking] Modern field stroke state model for Net11 editable controls (TextBoxBase) Open

NewApi-Net11 rendering-or-artifacts-issues

dotnet/winforms#14906 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
The ComboBox have the BackColor after setting DropDownStyle as DropDownList in NET11 mode Open

NewApi-Net11 rendering-or-artifacts-issues

dotnet/winforms#14907 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ComboBox displays the selected item with a dark blue selection background when DropDownStyle is DropDownList in NET11 mode Open

NewApi-Net11 rendering-or-artifacts-issues

dotnet/winforms#14908 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[API Proposal] Introduce ISymbol and ToolStrip Symbol support Open

api-suggestion NewApi-Net12 untriaged

dotnet/winforms#14921 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[API Proposal] Make ToolStrip.ImageScalingSize participate in AutoSize layout under VisualStylesMode.Net12 Open

api-suggestion area-Layout NewApi-Net12 untriaged

dotnet/winforms#14922 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Updating the Closing event handlers to FormClosing event handlers doesn't work with Application.Exit() sometimes Open

untriaged

dotnet/winforms#14924 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
WinForms Designer fails when `.resx` files are also included as `AdditionalFiles` Open

:beetle: bug untriaged

dotnet/winforms#14925 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Tracking] Modern focus / non-focus stroke rendering for Net11 editable controls (TextBoxBase) Open

dotnet/winforms#14926 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[Tracking] Increase light-mode border contrast for Net11 editable controls Open

dotnet/winforms#14927 · 0 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
[Tracking] Extend the modern stroke model to ComboBox and UpDown Open

dotnet/winforms#14928 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[Net11] Keep SplitContainer content alive while the splitter moves Open

rendering-or-artifacts-issues tenet-accessibility

dotnet/winforms#14931 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Research continuous SplitContainer repainting and derive the implementation approach Open

rendering-or-artifacts-issues

dotnet/winforms#14932 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add and validate automated SplitContainer continuous-repaint coverage Open

area-test coverage rendering-or-artifacts-issues

dotnet/winforms#14933 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Benchmark SplitContainer repaint performance and resource stability Open

rendering-or-artifacts-issues

dotnet/winforms#14935 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build a SplitContainer repaint sample and exploratory test matrix Open

rendering-or-artifacts-issues

dotnet/winforms#14936 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Application Builder] Establish the WinForms host and application lifetime Open

Review Issue

dotnet/winforms#14940 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Reconcile the Application Builder lifetime model with Generic Host and #11415 Open

Review Issue

dotnet/winforms#14941 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Prototype the core WinForms application builder and lifetime contracts Open

Review Issue

dotnet/winforms#14942 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement UI-thread startup, message-loop ownership, and graceful shutdown Open

Review Issue

dotnet/winforms#14943 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create automated lifetime and shutdown coverage and run it in CI Open

Review Issue

dotnet/winforms#14944 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Build host-lifetime samples and an exploratory validation matrix Open

Review Issue

dotnet/winforms#14945 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Benchmark startup, shutdown, and repeated host lifetime resource stability Open

Review Issue

dotnet/winforms#14946 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Application Builder] Enable Designer-safe dependency injection and UI scopes Open

Review Issue

dotnet/winforms#14947 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Research Designer-safe service assignment and UI scope ownership Open

Review Issue

dotnet/winforms#14948 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Define and prototype the Designer/runtime DI contract Open

Review Issue

dotnet/winforms#14949 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement scope-aware Form, UserControl, and component activation Open

Review Issue

dotnet/winforms#14950 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement and validate out-of-process Designer integration Open

Review Issue

dotnet/winforms#14951 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create DI, Designer, and scope lifecycle tests and run them in CI Open

Review Issue

dotnet/winforms#14952 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create a DI/scopes sample and exploratory compatibility matrix Open

Review Issue

dotnet/winforms#14953 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Stress-test scoped UI activation for leaks and resource retention Open

Review Issue

dotnet/winforms#14954 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Application Builder] Unify configuration, settings, logging, and desktop services Open

Review Issue

dotnet/winforms#14955 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Define configuration, settings, logging, and desktop-service boundaries Open

Review Issue

dotnet/winforms#14956 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement configuration and strongly typed options integration Open

Review Issue

dotnet/winforms#14957 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement the modern user-settings service and migration path Open

Review Issue

dotnet/winforms#14958 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement WinForms logging and unhandled-exception integration Open

Review Issue

dotnet/winforms#14959 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Integrate hosted services and desktop health diagnostics Open

Review Issue

dotnet/winforms#14960 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create service integration tests and run them locally and in CI Open

Review Issue

dotnet/winforms#14961 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create an infrastructure sample and exploratory deployment matrix Open

Review Issue

dotnet/winforms#14962 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Benchmark service startup and persistence resource stability Open

Review Issue

dotnet/winforms#14963 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Application Builder] Deliver templates, Blazor Hybrid composition, and adoption guidance Open

Review Issue

dotnet/winforms#14964 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Define the Application Builder template and sample matrix Open

Review Issue

dotnet/winforms#14965 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

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