winforms

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Crash (AccessViolationException/ExecutionEngineException) graphics.FillRectangle into Bitmap with Format24bppRgb

9

### .NET version The crash happens in all .NET Core Version I have tested (8/9/10). In .NET 8.0 it's an AccessViolationException and in 9/10 it's an ExecutionEngineException. ### Did it...

deng0

### .NET version latest .NET 10.0 ### Did it work in .NET Framework? No ### Did it work in any of the earlier releases of .NET Core or .NET 5+?...

Zheng-Li01

Branch [release/9.0](https://github.com/dotnet/winforms/commits/release/9.0/) in `dotnet/winforms` repo can't be mirrored from GitHub to Azure [internal/release/9.0](https://dev.azure.com/dnceng/internal/_git/dotnet-winforms?version=GBinternal%2Frelease%2F9.0&_a=history) via internal merge. There are conflicting commits in the target branch. The branch is configured to be...

dotnet-maestro-bot

[API Suggestion] WinForms Application Builder API Proposal

2

## Executive Summary This proposal outlines a comprehensive modernization of Windows Forms application development by introducing an **Application Builder Pattern** inspired by ASP.NET Core's proven infrastructure. The goal is to...

KlausLoeffelmann

### .NET version .NET SDK 10.0.00-rtm.25523.111 ### Did it work in .NET Framework? Yes ### Did it work in any of the earlier releases of .NET Core or .NET 5+?...

Amy-Li03

### .NET version .NET 11 with build 11.0.100-alpha.1.25608.106 ### Did it work in .NET Framework? Yes ### Did it work in any of the earlier releases of .NET Core or...

Olina-Zhang

Screen reader announcing incorrect row count information while navigating the table data: A11y_WinForm.NETRuntime_MonitorMrationsWindow_InfoAndRelationship

7

"Please do not close this bug. This bug should only be closed by TCS, C+AI Accessibility or the Divisional Driver." ### GitHub Tags: #A11ySev3; #A11yTCS; #WCAG1.3.1; #Win32; #DesktopApp; #Win11; #WinForms...

kupatkar99

[release/10.0] Refactor StatusStrip DefaultPadding calculation and adjust GripWidth for improved layout consistency

1

Backport https://github.com/dotnet/winforms/pull/14068 to release/10.0 Fixes #14062 ## Proposed changes - **GripWidth Adjustment** - Changed GripWidth from 12 to 15 to improve visual balance and reduce unnecessary space. - **Refactored DefaultPadding...

LeafShi1

### .NET version .NET SDK 11.0.100-alpha.1.25608.101 ### Did it work in .NET Framework? No ### Did it work in any of the earlier releases of .NET Core or .NET 5+?...

Zheng-Li01

Multi Select Enum Editor (UITypeEditor) Not Working Properly in .NET Core

6

### Environment Visual Studio 2026 - version 18.0.2 ### .NET version .NET 80, .NET90 and .NET10 ### Did this work in a previous version of Visual Studio and/or previous .NET...

Senthilkumar0803