Who contributed to .NET on August 12, 2026?

8 developers shipped this update, including Copilot, copilot-swe-agent, adamperlin, elinor-fung, vcsjones, dotnet-maestro, dotnet-maestro[bot], and github-actions[bot].

What were the notable .NET updates?

Avoid rooting cryptography through ZipArchive on browser, [crossgen2][wasm] Shrink Code Section Relocs, and Remove and clarify `PEAssembly` constructor parameters.

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The Wire · Showcase

BROWSER WASM BLOAT FIXED, RELOCATION SHRINKING SHIPS

By RepoJournal · Filed 07:01 UTC on August 12, 2026 · About .NET

8 people shipped this

dotnet-maestro @dotnet-maestro 7 cited

copilot-swe-agent @copilot-swe-agent 1 cited

adamperlin @adamperlin 1 cited

elinor-fung @elinor-fung 1 cited

vcsjones @vcsjones 1 cited

Copilot @Copilot

dotnet-maestro[bot] @dotnet-maestro[bot]

github-actions[bot] @github-actions[bot]

dotnet/runtime eliminated unnecessary cryptography dependencies from browser builds while implementing code section relocation optimizations that shrink Wasm binaries.

The headline fix addresses a regression where ZipArchive was rooting System.Security.Cryptography in browser-wasm builds even though WinZip AES is unsupported there [1]. The team excluded WinZip AES files and cryptography references from browser builds while providing stubs that throw PlatformNotSupportedException, keeping ZipCrypto intact for other platforms. Simultaneously, a relocation shrinking optimization in WasmObjectWriter [2] stops padding all code relocations to maximum 32-bit ULEB length of 5 bytes, instead re-writing each to minimal length and updating code blob LEB lengths accordingly. Related cleanup includes removing redundant PEAssembly constructor parameters [3] that were only used in one case and deleting unused OpenSSL interop methods [4]. The dotnet/dotnet aggregate continues pulling source updates from runtime, msbuild, efcore, nuget.client, and vstest [5] [6] [7], while dotnet/performance syncs dependencies from dotnet/dotnet, maui, android, and xharness [8] [9] [10] [11]. All systems flowing codeflow updates across the platform.

Action items

→ Review browser wasm application sizes after the cryptography exclusion dotnet/runtime [plan]
→ Monitor relocation shrinking impact on code section sizes in your Wasm builds dotnet/runtime [monitor]
→ Sync dotnet/dotnet codeflow updates into your build pipeline dotnet/dotnet [plan]

References

[1] Avoid rooting cryptography through ZipArchive on browser ↗ dotnet/runtime
[2] [crossgen2][wasm] Shrink Code Section Relocs ↗ dotnet/runtime
[3] Remove and clarify `PEAssembly` constructor parameters ↗ dotnet/runtime
[4] Remove unused OpenSSL Interop ↗ dotnet/runtime
[5] [main] Source code updates from dotnet/runtime ↗ dotnet/dotnet
[6] [main] Source code updates from dotnet/msbuild ↗ dotnet/dotnet
[7] [main] Source code updates from dotnet/efcore ↗ dotnet/dotnet
[8] [main] Update dependencies from dotnet/dotnet ↗ dotnet/performance
[9] [main] Update dependencies from dotnet/maui ↗ dotnet/performance
[10] [main] Update dependencies from dotnet/android ↗ dotnet/performance
[11] [main] Update dependencies from dotnet/xharness ↗ dotnet/performance

Quick answers

What shipped in .NET on August 12, 2026?: dotnet/runtime eliminated unnecessary cryptography dependencies from browser builds while implementing code section relocation optimizations that shrink Wasm binaries. In total, 41 commits, 41 pull requests, and 9 releases landed.
Who contributed to .NET on August 12, 2026?: 8 developers shipped this update, including Copilot, copilot-swe-agent, adamperlin, elinor-fung, vcsjones, dotnet-maestro, dotnet-maestro[bot], and github-actions[bot].
What were the notable .NET updates?: Avoid rooting cryptography through ZipArchive on browser, [crossgen2][wasm] Shrink Code Section Relocs, and Remove and clarify `PEAssembly` constructor parameters.

SSLSTREAM OVERHAUL LANDS WITH LEGACY ESCAPE HATCH

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

dotnet 129 shipped

@dotnet Aug 11

BLAZOR TESTING OVERHAUL SHIPS NATIVE AOT HARNESS, ROSLYN REVERTS SONIC SPLIT

ASP.NET Core's Components.Testing library graduates from xUnit to MSTest on Microsoft Testing Platform, while Roslyn backs out its ambitious Sonic declaration/implementation split to unblock the next build.

+10

dotnet 66 shipped

@dotnet Aug 10

RAZOR DECL/IMPL SPLIT BREAKS ASPNETCORE RUNTIME COMPILER

A recent Razor refactor removed public APIs that ASP.NET Core's runtime view compiler depends on, forcing an emergency restore.

dotnet 8 shipped

@dotnet Aug 9

RUNTIME JITS AWAY XML SERIALIZER DEPENDENCY, ORLEANS DOCS RESCUE MISSION CONTINUES

The .NET runtime shed a test dependency on XML serialization while Orleans spent the day restoring critical guidance that vanished in a recent docs overhaul.

dotnet 34 shipped

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