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wire 2026-05-28
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ROSLYN CLEANS HOUSE WHILE MACIOS FIXES REDIRECT BEHAVIOR

By RepoJournal · Filed · About .NET · Composed from the cited sources · methodology

RikkiGibson davidwengier akhera99 dotnet-maestro[bot] dependabot[bot]
5 people shipped this
RikkiGibson @RikkiGibson 1 cited davidwengier @davidwengier 1 cited akhera99 @akhera99 1 cited dotnet-maestro[bot] @dotnet-maestro[bot] 1 cited dependabot[bot] @dependabot[bot] 1 cited

The compiler team is scrubbing dead code from the runtime, and iOS handlers are getting yanked into .NET compatibility.

Roslyn shipped three significant housekeeping PRs overnight: a rename of ClosedAttribute to IsClosedTypeAttribute to align with runtime decisions [1], removal of genuinely unused code and an entire dead project [2], and new LSP progress reporting during project load [3]. On the macOS side, NSUrlSessionHandler now handles HTTP redirects like .NET handlers do, resolving credentials against the redirect target instead of the original request [4]. This is a breaking change for existing code that relied on the old behavior. The macios team also yanked support for ZeroCopyStrings from the binding generator [5], a feature that never worked properly in .NET anyway. Authentication tests got hardened with server-side request tracking [6], and GitHub workflows are now pinning action versions and dropping unnecessary credentials [7]. Winforms continues pulling in VMR updates [9], and dev-proxy bumped its Docker build action [10]. The PAT migration to WIF continues in Roslyn [8], replacing legacy service connections across the stack.

Action items

References

  1. [1] Rename ClosedAttribute to IsClosedTypeAttribute ↗ dotnet/roslyn
  2. [2] Remove dead code and project ↗ dotnet/roslyn
  3. [3] Report percentage progress during LSP project loading ↗ dotnet/roslyn
  4. [4] Make NSUrlSessionHandler handle redirects like the .NET handlers do (#25529) ↗ dotnet/macios
  5. [5] [bgen] Remove support for ZeroCopyStrings (#25515) ↗ dotnet/macios
  6. [6] [tests] Improve new BasicAuthWorksWhenBearerIsAdvertisedFirst test. (#25503) ↗ dotnet/macios
  7. [7] [github] Fix workflows to pin actions & drop credentials when possible. (#25545) ↗ dotnet/macios
  8. [8] [PAT Migration] Replace devdiv/engineering SC with WIF (WI 10126) (#83723) dotnet/roslyn ↗
  9. [9] [main] Source code updates from dotnet/dotnet ↗ dotnet/winforms
  10. [10] Bump docker/build-push-action from 7.1.0 to 7.2.0 ↗ dotnet/dev-proxy

$ ls dotnet/reviews/ # the step-back reads

the week in review CVE-2026-69304 hits ASP.NET Core; Spark 4.0 support lands the month in review F# interpolated strings and record spreads land as Orleans and runtime harden
Full archive → Weekly reviews →

Quick answers

What shipped in .NET on May 28, 2026?
The compiler team is scrubbing dead code from the runtime, and iOS handlers are getting yanked into .NET compatibility. In total, 27 commits and 28 pull requests landed.
Who contributed to .NET on May 28, 2026?
5 developers shipped this update, including RikkiGibson, davidwengier, akhera99, dotnet-maestro[bot], and dependabot[bot].
What were the notable .NET updates?
Rename ClosedAttribute to IsClosedTypeAttribute, Remove dead code and project, and Report percentage progress during LSP project loading.
♥

$ log @dotnet --recent

Vector literals stop breaking under comma-decimal cultures, AIDL one-way proxies generate correctly 83 shipped Spark 4.0 lands in .NET bindings, arcade refreshes Entra tokens mid-job 23 shipped MSBuild TaskAnalyzer quiets three diagnostics, Terminal Logger stops corrupting shared log events 20 shipped MAUI backports iOS regression coverage, aspnetcore bumps extensions 6 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training GSM8K scoring parses answers as exact decimals AI Red Teaming PyRIT closes a judge-spoofing hole, promptfoo accepts Langfuse v6

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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