Update .NET 11 desktop “What’s new” docs for Preview 4 (WPF + WinForms) by Copilot · Pull Request #2233 · dotnet/docs-desktop

Copilot · 2026-05-08T17:11:12Z

Updates the .NET 11 desktop “What’s new” content for Preview 4 and aligns the .NET 11 article layout with net100.md (no per-preview subheadings in detail sections). WPF reflects no Preview 4 changes and retains Preview 3 bug-fix content, and WinForms documents the Preview 4 clipboard bitmap retrieval fix with a round-trip snippet.

WinForms: Preview 4 content refresh
- Updated dotnet-desktop-guide/winforms/whats-new/net110.md metadata and heading to Preview 4.
- Added Preview 4 release announcement link.
- Documented the Clipboard.GetDataObject().GetImage() / DataObject.GetImage() bitmap fix and typed→legacy fallback behavior.
- Added API xrefs for Clipboard.GetDataObject, DataObject.GetImage, and Clipboard.GetImage.
- Added the requested clipboard round-trip code snippet.
- Removed the obsolete Preview 3 No updates section now that Preview 4 includes updates.
WPF: Preview 4 content refresh
- Updated dotnet-desktop-guide/wpf/whats-new/net110.md metadata and heading to Preview 4.
- Added Preview 4 release announcement link.
- Preserved running-list content without per-preview detail subheadings.
- Kept Preview 3 bug-fix details and a Preview 4 no-updates statement.
Index updates
- Updated Preview section/version text in:
  - dotnet-desktop-guide/winforms/whats-new/index.md
  - dotnet-desktop-guide/wpf/whats-new/index.md
- WinForms index links to Preview 4 overview + bug-fix anchor.
- WPF index links to Preview 4 overview.

## Bug fixes

In .NET 11 Preview 4, <xref:System.Windows.Forms.Clipboard.GetDataObject> and <xref:System.Windows.Forms.DataObject.GetImage> return bitmap images placed on the clipboard. `DataObject.GetImage` checks the typed clipboard pipeline first, and falls back to the legacy path so the behavior matches <xref:System.Windows.Forms.Clipboard.GetImage>.

The following code now round-trips bitmap images when `bitmap` is an existing <xref:System.Drawing.Bitmap>:

```csharp
// This code round-trips bitmap images again on .NET 11 Preview 4.
Clipboard.SetImage(bitmap);
Image? image = Clipboard.GetDataObject()?.GetImage();

Internal previews

📄 File	🔗 Preview link
dotnet-desktop-guide/winforms/whats-new/index.md	dotnet-desktop-guide/winforms/whats-new/index
dotnet-desktop-guide/winforms/whats-new/net110.md	dotnet-desktop-guide/winforms/whats-new/net110
dotnet-desktop-guide/wpf/whats-new/index.md	dotnet-desktop-guide/wpf/whats-new/index
dotnet-desktop-guide/wpf/whats-new/net110.md	dotnet-desktop-guide/wpf/whats-new/net110

Agent-Logs-Url: https://github.com/dotnet/docs-desktop/sessions/375e7483-c30d-4416-a54e-4ca31e257ff7 Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

adegeo · 2026-05-08T17:28:39Z

@copilot the updates in the .net 11 preview whats new articles are running lists, don't erase existing items. Also, here's code that now roundtrips for the winforms clipboard fix, add it:

// Round-trips again on .NET 11 Preview 4
Clipboard.SetImage(bitmap);
Image? image = Clipboard.GetDataObject()?.GetImage();

Agent-Logs-Url: https://github.com/dotnet/docs-desktop/sessions/3dea920b-d602-4b03-92fc-6e8b8eba281c Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

Copilot · 2026-05-08T17:32:03Z

@copilot the updates in the .net 11 preview whats new articles are running lists, don't erase existing items. Also, here's code that now roundtrips for the winforms clipboard fix, add it:

Updated. I restored the running-list entries in both .NET 11 preview articles and added the requested WinForms clipboard round-trip code snippet in net110.md. Addressed in commit 30d6716 (plus follow-up style refinements in f3b94a1).

adegeo · 2026-05-08T17:32:39Z

@copilot almost there. for styling and layout, check how net100.md is formed. No need to call out individual previews in the details.

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adegeo · 2026-05-08T17:39:37Z

 ## No updates

-Windows Forms hasn't had any notable updates in .NET 11 Preview releases.
+Windows Forms does not have notable updates in .NET 11 Preview 3.


@copilot get rid of this section, not needed anymore, now that there has been an update.

Removed that section in commit 6d902c5. Screenshot: N/A (docs-only change).

Agent-Logs-Url: https://github.com/dotnet/docs-desktop/sessions/38cb06c7-0a56-4407-aaf1-2bfb78796684 Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

Copilot · 2026-05-08T17:41:36Z

@copilot almost there. for styling and layout, check how net100.md is formed. No need to call out individual previews in the details.

Updated to match the net100.md layout: I removed per-preview subheadings from the detail sections and kept the running-list content in section prose. Addressed in commit 2ccf140 with follow-up wording/style refinements through 8444a62. Screenshot: N/A (docs-only change).

Agent-Logs-Url: https://github.com/dotnet/docs-desktop/sessions/38cb06c7-0a56-4407-aaf1-2bfb78796684 Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

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adegeo · 2026-05-08T18:12:58Z

+## No updates
+
+WPF has no notable updates in .NET 11 Preview 4.


@copilot No need to point out no updates for specific releases

Initial plan

7966d99

Copilot AI assigned Copilot and adegeo May 8, 2026

Copilot started work on behalf of adegeo May 8, 2026 17:11 View session

Copilot AI linked an issue May 8, 2026 that may be closed by this pull request

.NET 11 Preview 4 updates for WPF and WinForms #2231

Open

Update WPF and WinForms .NET 11 docs to Preview 4

484e498

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Copilot AI changed the title ~~[WIP] Update what's new for .NET 11 Preview 4 changes~~ Update .NET 11 desktop “What’s new” docs for Preview 4 (WPF + WinForms) May 8, 2026

Copilot finished work on behalf of adegeo May 8, 2026 17:14

Copilot AI requested a review from adegeo May 8, 2026 17:14

Copilot started work on behalf of adegeo May 8, 2026 17:28 View session

Copilot AI and others added 4 commits May 8, 2026 17:30

Preserve running .NET 11 lists and add WinForms clipboard snippet

30d6716

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Refine WinForms running-list wording and snippet context

5d94748

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Use active voice in WinForms clipboard snippet comment

93a4d19

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Apply style fixes in .NET 11 preview articles

f3b94a1

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Copilot started work on behalf of adegeo May 8, 2026 17:32 View session

Copilot finished work on behalf of adegeo May 8, 2026 17:33

Copilot AI and others added 9 commits May 8, 2026 17:34

Align .NET 11 whats-new layout with net100 style

2ccf140

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Normalize WinForms no-updates section formatting

cd9616a

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Use active voice in WPF preview 3 bug-fix bullet

167a21e

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Adjust tense and punctuation in .NET 11 bug-fix bullets

493c0ed

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Use paragraph layout for .NET 11 bug-fix details

e1c5bb9

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Improve .NET 11 bug-fix prose readability

4e572d2

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Add Oxford comma in WinForms clipboard sentence

b2372d1

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Tighten WinForms clipboard sentence wording

91984b9

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Use present tense and explicit no-updates phrasing

35b2d3f

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adegeo reviewed May 8, 2026

View reviewed changes

Clarify preview reference in WPF bug-fix paragraph

b88d8f0

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Copilot AI and others added 2 commits May 8, 2026 17:40

Refine wording precision and conversational tone

3c0fa68

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Improve readability in .NET 11 bug-fix text

95b58cb

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Finalize net110 layout and phrasing alignment with net100

7617dfd

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Copilot finished work on behalf of adegeo May 8, 2026 17:42

Copilot AI requested a review from adegeo May 8, 2026 17:42

Copilot started work on behalf of adegeo May 8, 2026 17:42 View session

Remove obsolete no-updates section from WinForms net110

6d902c5

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Copilot finished work on behalf of adegeo May 8, 2026 17:44

adegeo reviewed May 8, 2026

View reviewed changes

adegeo added 2 commits May 8, 2026 11:22

Update net110.md

b74c940

Update net110.md

2cee992

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Update .NET 11 desktop “What’s new” docs for Preview 4 (WPF + WinForms)#2233

Update .NET 11 desktop “What’s new” docs for Preview 4 (WPF + WinForms)#2233
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edited by adegeo

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		## No updates

		WPF has no notable updates in .NET 11 Preview 4.

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