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

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Related https://github.com/dotnet/winforms/issues/13442 ## Proposed changes Add unit test file:DataGridViewComboBoxCellTest.cs for public/protected methods of the DataGridViewComboBoxCell.cs ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/dotnet/winforms/pull/13654)

area-test coverage

Fixes #9807 ## Proposed changes - Add Remove dependance on WebClient for VB FileDownload by using HttpClient - Upload still uses WebClient that also needs to be done as a...

:construction: work in progress
area-VisualBasic
draft

Enable nullability for `ToolStripTemplateNode` ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/dotnet/winforms/pull/13401)

waiting-review
draft
area-NRT

Fixes #12042 - TreeNode and ListItem not displaying in dark mode during editing, even though application is set to be in dark mode. ## Proposed changes If the application is...

draft
area-DarkMode

## Overview This PR validates that Clipboard and DataObject support specialized data retrieval features, particularly for working with raw data and NRBF serialized content. It adds comprehensive tests to document...

area-Infrastructure
draft

This PR adds comprehensive tests for `Hashtable` serialization handling in `CoreNrbfSerializer` to ensure we're properly handling instances with unsupported content and not losing data over fields we don't currently handle...

area-Infrastructure
draft

Fixes # ## Proposed changes - - - ## Customer Impact - - ## Regression? - Yes / No ## Risk - ## Screenshots ### Before ### After ## Test...

draft
area-Analyzers/CodeFixes

Addresses #12696, #12697 (Mentioning the latter just for same topic. I do not think, this is an issue really.) ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/dotnet/winforms/pull/13564)

draft
needs-area-label

Fixes #11950 Fixes #11949 Fixes #12909 Fixes #11893 Fixes #11901 Fixes #12040 ## Proposed changes - Enhanced dark mode visual style generation and selection logic, with custom handling for Button,...

draft
area-DarkMode

### GitHub Tags #A11ySev3; #A11yTCS; #WCAG2.5.8; #Win32; #DesktopApp; #Win11; #WinForms .NET Runtime; #BM_WinForms.NETRuntime_Win32_June2025; #TargetSize; #A11yWCAG2.2; ### Environment Details Application Name: WinForms Runtime Microsoft Windows 11 Enterprise (24H2) Build on 26100.4061...

tenet-accessibility