dotnet/winforms

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

Implement basic C# and VB Application Builder templates Open

Review Issue

dotnet/winforms#14966 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement the WinForms Blazor Hybrid composition template Open

Review Issue

dotnet/winforms#14967 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create migration, enterprise, system-tray, and backend samples Open

Review Issue

dotnet/winforms#14968 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Automate template creation, build, run, publish, and CI validation Open

Review Issue

dotnet/winforms#14969 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Run template, Designer, accessibility, and deployment exploratory testing Open

Review Issue

dotnet/winforms#14970 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Measure generated application startup and publish footprint Open

Review Issue

dotnet/winforms#14971 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Application Builder] Bring Visual Basic Application Framework capabilities to the shared model Open

Review Issue

dotnet/winforms#14972 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Inventory Visual Basic Application Framework behavior and define the parity contract Open

Review Issue

dotnet/winforms#14973 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Design shared VB/C# application-feature contracts and migration adapters Open

Review Issue

dotnet/winforms#14974 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement shared startup, shutdown, exception, and command-line features Open

Review Issue

dotnet/winforms#14975 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement secure single-instance and next-instance activation Open

Review Issue

dotnet/winforms#14976 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement shared splash-screen and application-service capabilities Open

Review Issue

dotnet/winforms#14977 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create cross-language parity and compatibility tests and run them in CI Open

Review Issue

dotnet/winforms#14978 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create VB-to-shared-model and C# feature samples with migration guidance Open

Review Issue

dotnet/winforms#14979 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Run multi-instance, Terminal Services, architecture, and slow-machine validation Open

Review Issue

dotnet/winforms#14980 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Benchmark VB-parity startup, activation, and resource stability Open

Review Issue

dotnet/winforms#14981 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
.Net11 visual Styles - SystemVisualSettingsChanged event for Windows Theme change Open

dotnet/winforms#14987 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Testing result of Pull Request #14919: Add a per-state stroke model for Net11 editable-control borders Open

internal-validation

dotnet/winforms#14997 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Testing result of Pull Request #14887: Fixed the issue where text in controls such as TextBox and ComboBox was obscured at the bottom Open

internal-validation

dotnet/winforms#15018 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Re-enable net481 code coverage once coverlet .NET Framework instrumentation is fixed Open

area-Infrastructure-CI tracking-external-issue

dotnet/winforms#15030 · 0 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AccessibleObject answers IRawElementProviderFragment.get_FragmentRoot with S_OK and a null root; UIAutomationCore crashes in TextPattern.RangeFromPoint and the app freezes 15-30 s under JAWS Open

dotnet/winforms#15043 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Details-mode ListView advertises GridPattern but GetItem(row, column) returns empty elements, so JAWS, NVDA and Narrator read only the first column Open

dotnet/winforms#15044 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
`Control.Visible` binding does not activate when `Visible` was explicitly set to `false` before `DataBindings.Add` was called Open

area-System.Drawing untriaged

dotnet/winforms#15067 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
[Bug]: NotifyIcon displays an empty, miniature black tooltip box when Text is string.Empty on Windows 11 Open

untriaged

dotnet/winforms#15051 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Disabled RichTextBox renders BackColor in padding area but not in client area under NET11 VisualStylesMode Open

NewApi-Net11 untriaged

dotnet/winforms#15053 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
RichTextBox is not fully borderless with BorderStyle=None under VisualStylesMode.NET11 Open

NewApi-Net11 untriaged

dotnet/winforms#15055 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Controls from the toolbox cannot be dropped into UserControl docked in a Panel Open

untriaged

dotnet/winforms#15057 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
TableLayoutPanel layout has quadratic reservation-row advancement for deep row spans Open

dotnet/winforms#15066 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Preserve logical ExecutionContext when marshaling callbacks with Control.Invoke/BeginInvoke Open

api-suggestion untriaged

dotnet/winforms#15068 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
DataGridViewDarkModeTheming: DataGridViewComboBoxColumn and DataGridViewButtonColumn do not appear to fully adopt dark mode colors after enabling dark mode theming Open

area-DarkMode untriaged

dotnet/winforms#15077 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Testing result of Pull Request #15075 Fix DataGridView ComboBox and Button cell rendering in dark mode Open

internal-validation

dotnet/winforms#15082 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
The tooltip text is not in DarkMode for the items in the propertyGrid control Open

area-DarkMode untriaged

dotnet/winforms#15083 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Failed setting the color value for the SortGlyphColor item in the CellStyle Builder page of RowsDefaultCellStyle property for DataGridView control Open

:boom: regression-preview untriaged

dotnet/winforms#15091 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Removing multiple rows while selecting the last new-item row in DataGridView leads to exception Open

untriaged

dotnet/winforms#15093 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

A short digest of beginner-friendly GitHub issues.