Who contributed to .NET on August 13, 2026?

11 developers shipped this update, including Tomas Weinfurt, Radek Zikmund, Copilot, Adam Perlin, auduchinok, T-Gro, premun, and YuliiaKovalova, and 3 more.

What were the notable .NET updates?

TlsContext/TlsSession: document lifetime, tighten AttachSocket (#131457), Fix SslStream client certificate credential caching (#132079), and Add SslStream legacy path compatibility switch (#132210).

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The Wire · Showcase

SSLSTREAM OVERHAUL LANDS WITH LEGACY ESCAPE HATCH

By RepoJournal · Filed 07:01 UTC on August 13, 2026 · About .NET

11 people shipped this

auduchinok @auduchinok 3 cited

dotnet-maestro @dotnet-maestro 3 cited

Radek Zikmund @rzikm 2 cited

Tomas Weinfurt @wfurt 1 cited

Copilot @Copilot 1 cited

Adam Perlin @adamperlin 1 cited

premun @premun 1 cited

YuliiaKovalova @YuliiaKovalova 1 cited

T-Gro @T-Gro

Viktor Hofer @ViktorHofer

akoeplinger @akoeplinger

Runtime ships certificate caching fix and compatibility switch as TlsSession integration matures across three critical patches.

The SslStream refactor that began with #130366 just hit a turning point. Two fixes landed simultaneously: a certificate credential caching bug on Windows [2] where client certificates supplied through ClientCertificateContext were bleeding across shared authentication contexts, and a new AppContext switch that lets applications fall back to the legacy handshake path if the new TlsSession wedge causes trouble [3]. A third cleanup tidied up TlsContext/TlsSession lifetime documentation [1]. These land as the HTTP/1.1 parser enforcement tightens; chunked response tests now correctly reject bare-LF delimiters and require CRLF framing [4]. On the Wasm side, RyuJIT cleanup continues removing unreachable NYI_WASM stubs [5]. The F# compiler shipped major infrastructure work: lazy namespace/type definition loading [6] that Rider custom module readers depend on, symbol and type highlighting in diagnostics [7], and parser recovery for unfinished abstract members [8]. Build infrastructure hardened against curl retry corruption in binlog downloads [10] and fixed Helix job chain ID computation to prevent independent jobs from merging [9]. The dotnet VMR absorbed updates from msbuild, winforms, and fsharp subscriptions [11], [12], [13].

Action items

→ Review the new UseLegacySslStreamHandshake AppContext switch if you maintain TLS-heavy workloads dotnet/runtime [plan]
→ Validate chunked HTTP/1.1 response parsing in tests uses CRLF line endings dotnet/runtime [plan]
→ Pull F# compiler updates for lazy type loading and diagnostic highlighting dotnet/fsharp [monitor]
→ Verify Arcade binlog artifact downloads succeed on transient failures dotnet/arcade [monitor]

References

[1] TlsContext/TlsSession: document lifetime, tighten AttachSocket (#131457) dotnet/runtime
[2] Fix SslStream client certificate credential caching (#132079) dotnet/runtime
[3] Add SslStream legacy path compatibility switch (#132210) dotnet/runtime
[4] Use CRLF for chunked response framing test (#132124) dotnet/runtime
[5] [Wasm RyuJIT]: Remove more unreachable NYI_WASM entries (#132170) dotnet/runtime
[6] IL: add ILPreNamespace, make ILPreTypeDef creation lazy ↗ dotnet/fsharp
[7] Add symbol and type highlighting to F# diagnostics ↗ dotnet/fsharp
[8] Parser: recover on unfinished abstract members ↗ dotnet/fsharp
[9] Job Monitor - Fix job chain ID computation ↗ dotnet/arcade
[10] Download binlog artifacts to a file so curl retries cannot corrupt them ↗ dotnet/arcade
[11] [main] Source code updates from dotnet/msbuild ↗ dotnet/dotnet
[12] [main] Source code updates from dotnet/winforms ↗ dotnet/dotnet
[13] [main] Source code updates from dotnet/fsharp ↗ dotnet/dotnet

Quick answers

What shipped in .NET on August 13, 2026?: Runtime ships certificate caching fix and compatibility switch as TlsSession integration matures across three critical patches. In total, 64 commits, 64 pull requests, and 1 releases landed.
Who contributed to .NET on August 13, 2026?: 11 developers shipped this update, including Tomas Weinfurt, Radek Zikmund, Copilot, Adam Perlin, auduchinok, T-Gro, premun, and YuliiaKovalova, and 3 more.
What were the notable .NET updates?: TlsContext/TlsSession: document lifetime, tighten AttachSocket (#131457), Fix SslStream client certificate credential caching (#132079), and Add SslStream legacy path compatibility switch (#132210).

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@dotnet Aug 12

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