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.NET 11 Preview 2 release notes#10266

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.NET 11 Preview 2 release notes#10266
jamesmontemagno wants to merge 13 commits intomainfrom
dotnet11-preview2

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@jamesmontemagno jamesmontemagno commented Feb 17, 2026

- 📝 Update prompt titles for clarity
- 🔄 Simplify input requirements by removing MILESTONE_KIND and MILESTONE_NUMBER
- 📂 Adjust folder structure and file creation steps for consistency
- 🚫 Remove unnecessary duplication of component files in the scaffolding process
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I take it you're expecting to have slightly different prompts and details for the RC milestones since you changed this to be Preview-specific. If that's intentional, looks good with just a couple comments to update assignees.

jeffhandley and others added 3 commits March 3, 2026 23:47
* Add .NET 11.0 Preview 2 API diff

Original Prompt: Create the next API Diff

Command:
cd release-notes
.\RunApiDiff.ps1

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Exclude changes solely from Obsolete attribute message diff

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Add fsharp.md for .NET 11 Preview 2

* Update F# release notes for .NET 11 Preview 2

This release includes new language features, performance improvements, and bug fixes for F# in .NET 11 Preview 2. Highlights include simplified DIM interface hierarchies, overload resolution caching, Big-O complexity documentation, and enhancements to query expressions and IDE features.

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Co-authored-by: Tomas Grosup <tomasgrosup@microsoft.com>
* Add libraries.md for .NET 11 Preview 2

* Improve libraries-release-notes skill and copilot instructions

- Add reviewer suggestion step (Step 5) that gathers PR authors, assignees,
  mergers, and coauthors to suggest release notes reviewers grouped by area
- Add feature grouping guidance to categorize related PRs under single sections
- Add positive tone guidelines to editorial rules
- Add issue/PR reference format rules: {org}/{repo}#{number} with markdown links
- Add copilot-instructions.md entry so future sessions discover the skill
- Update data collection and enrichment steps to populate reviewers table
- Exclude bots and Copilot from all reviewer suggestions including coauthors

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add .NET 11 Preview 2 Libraries release notes

New features: ProcessExitStatus, PosixSignal.SIGKILL, TarFile format
selection, and JsonSerializerOptions.GetTypeInfo<T>().

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address feedback and augment .NET Libraries Preview 2 release notes.

Author release notes for .NET Libraries in .NET 11 Preview 2 covering
the 2026-01-26..2026-02-11 date range. Includes:

- Generic GetTypeInfo<T> for System.Text.Json
- Tar archive format selection
- Matrix4x4.GetDeterminant ~15% faster
- Bug fix summary across 9 areas
- Community contributors section

Process APIs (ProcessExitStatus, PosixSignal.SIGKILL) excluded per
instructions as the feature is incomplete.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Delete libraries-release-notes skill. Use the release-notes skill from #10282 instead.

* Reformat bug fixes section to use grouped sub-bullet style

Update the Libraries Preview 2 release notes bug fixes section to use
nested sub-bullets grouped by area, matching the revised formatting
guidelines. Multi-fix areas (System.Net.Http, System.Numerics) are now
consolidated under their area heading, and single-fix areas also use
sub-bullets for consistency.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@jongalloway jongalloway changed the title Refactor .NET 11 Preview 2 release notes scaffolding .NET 11 Preview 2 release notes Mar 6, 2026
jamesmontemagno and others added 5 commits March 6, 2026 11:52
* Add wpf.md for .NET 11 Preview 2

* Revise WPF release notes for Preview 2

Updated section headers and content for clarity.

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Co-authored-by: Andy (Steve) De George <67293991+adegeo@users.noreply.github.com>
Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com>
Co-authored-by: Jeff Handley <jeffhandley@users.noreply.github.com>
* Add efcore.md for .NET 11 Preview 2

* EF Core 11 preview.2 docs

---------

Co-authored-by: Shay Rojansky <roji@roji.org>
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I've merged the completed ones, closed the ones that said nothing in this release, and pinged those with no activity. Looks like ASP.NET and MAUI are on track.

T-Gro and others added 2 commits March 7, 2026 00:12
…tional bug fixes (#10290)

- Add #elif preprocessor directive section (RFC FS-1334, langversion:11.0)
- Add partitionWith for collections section (Array/List/Set/Array.Parallel)
- Add Set.intersect performance fix, state machine improvements, ARM64 fix,
  strong name signing fix, and other bug fixes
- Add #19358 FAR fix to the FAR section

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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4 participants