WinForms

dotnet/winforms

[main] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[main] Source code updates from dotnet/dotnet" (#15198)
on 25 September 2026 by dotnet-maestro[bot]

[release/10.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/10.0] Source code updates from dotnet/dotnet" (#15193)
on 24 September 2026 by dotnet-maestro[bot]

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15197)
on 24 September 2026 by dotnet-maestro[bot]

Fix Issue 15162: [Dark Mode] The dotnet line of button is black in DarkMode

Open

Open PR "Fix Issue 15162: [Dark Mode] The dotnet line of button is black in DarkMode" (#15196)
on 24 September 2026 by SimonZhao888

Fix Issue 15190: TreeNodeCollection indexer setter throws NullReferenceException for a TreeNode not attached to a TreeView (regression since .NET 6)

Open

Open PR "Fix Issue 15190: TreeNodeCollection indexer setter throws NullReferenceException for a TreeNode not attached to a TreeView (regression since .NET 6)" (#15195)
on 24 September 2026 by SimonZhao888

release-notes in .NET 11 RC2

Closed

Closed issue "release-notes in .NET 11 RC2" (#15173)
on 24 September 2026 by LeafShi1

[main] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[main] Source code updates from dotnet/dotnet" (#15194)
on 24 September 2026 by dotnet-maestro[bot]

[release/11.0-rc2] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0-rc2] Source code updates from dotnet/dotnet" (#15192)
on 24 September 2026 by dotnet-maestro[bot]

Make MonthCalendar selection tests independent of midnight

Open

Open PR "Make MonthCalendar selection tests independent of midnight" (#15191)
on 23 September 2026 by mmitche

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15189)
on 23 September 2026 by dotnet-maestro[bot]

TreeNodeCollection indexer setter throws NullReferenceException for a TreeNode not attached to a TreeView (regression since .NET 6)

Open

Open issue "TreeNodeCollection indexer setter throws NullReferenceException for a TreeNode not attached to a TreeView (regression since .NET 6)" (#15190)
on 23 September 2026 by ricardobossan

[release/11.0-rc2] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0-rc2] Source code updates from dotnet/dotnet" (#15188)
on 23 September 2026 by dotnet-maestro[bot]

[release/10.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/10.0] Source code updates from dotnet/dotnet" (#15181)
on 23 September 2026 by dotnet-maestro[bot]

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15186)
on 23 September 2026 by dotnet-maestro[bot]

Improve DataGridView row selection performance by avoiding redundant row traversal

Open

Open PR "Improve DataGridView row selection performance by avoiding redundant row traversal" (#15187)
on 23 September 2026 by LeafShi1

[release/11.0-rc2] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0-rc2] Source code updates from dotnet/dotnet" (#15185)
on 23 September 2026 by dotnet-maestro[bot]

Localized file check-in by OneLocBuild Task: Build definition ID 164: Build ID 3087198

Open

Open PR "Localized file check-in by OneLocBuild Task: Build definition ID 164: Build ID 3087198" (#15184)
on 23 September 2026 by dotnet-oneloc-localization[bot]

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15183)
on 23 September 2026 by dotnet-maestro[bot]

[main] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[main] Source code updates from dotnet/dotnet" (#15182)
on 23 September 2026 by dotnet-maestro[bot]

Validate UI test input counts and actual foreground window

Open

Open PR "Validate UI test input counts and actual foreground window" (#15180)
on 22 September 2026 by mmitche

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15175)
on 22 September 2026 by dotnet-maestro[bot]

Make a ContextMenuStrip opened from the keyboard speak in screen readers

Open

Open PR "Make a ContextMenuStrip opened from the keyboard speak in screen readers" (#15179)
on 22 September 2026 by kastwey

A ContextMenuStrip opened from the keyboard is silent for screen readers (no MenuOpened the first time, no item focused)

Open

Open issue "A ContextMenuStrip opened from the keyboard is silent for screen readers (no MenuOpened the first time, no item focused)" (#15178)
on 22 September 2026 by kastwey

Fix inverted NoClientNotifications check in Control.AccessibilityNotifyClients

Open

Open PR "Fix inverted NoClientNotifications check in Control.AccessibilityNotifyClients" (#15177)
on 22 September 2026 by kastwey

Regression in .NET 10: controls no longer raise MSAA WinEvents (inverted `NoClientNotifications` check in `Control.AccessibilityNotifyClients`)

Open

Open issue "Regression in .NET 10: controls no longer raise MSAA WinEvents (inverted `NoClientNotifications` check in `Control.AccessibilityNotifyClients`)" (#15176)
on 22 September 2026 by kastwey

Section 508 502.3.1: (dotnet/list 'Controls list') The Name property must not include the element's control type.: A11y_Winform_ListTreeGrid_AI4D

Open

Open issue "Section 508 502.3.1: (dotnet/list 'Controls list') The Name property must not include the element's control type.: A11y_Winform_ListTreeGrid_AI4D" (#15174)
on 22 September 2026 by PoojaNamde

[release/11.0] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[release/11.0] Source code updates from dotnet/dotnet" (#15172)
on 22 September 2026 by dotnet-maestro[bot]

[main] Source code updates from dotnet/dotnet

Merged or Closed

Closed or merged PR "[main] Source code updates from dotnet/dotnet" (#15170)
on 22 September 2026 by dotnet-maestro[bot]

When DataGridView has a lot of rows, selecting row near bottom of DataGridView is very slow

Open

Open issue "When DataGridView has a lot of rows, selecting row near bottom of DataGridView is very slow" (#15171)
on 22 September 2026 by hjin1113-web

Selected state is not announced for combo Box options.: A11y_Winform_Input_NameRoleValue

Open

Open issue "Selected state is not announced for combo Box options.: A11y_Winform_Input_NameRoleValue" (#15169)
on 21 September 2026 by PoojaNamde