API diff between .NET 11 Preview 6 and .NET 11 RC 1

[github-actions]

Note

Incremental public API diff .NET 11 Preview 6 → .NET 11 RC 1.

Draft — auto-maintained while .NET 11 RC 1 is the in-development frontier.

Incremental diff: 11.0-preview.6 (11.0.0-preview.6.26359.118) → 11.0-rc.1 (11.0.0-rc.1.26411.101), track: incremental.

How this was generated

Generated by the api-diff skill / RunApiDiff.ps1.

• Previous: 11.0.0-preview.6.26359.118 @ https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json
• Current: 11.0.0-rc.1.26411.101 @ https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet11/nuget/v3/index.json
• Generated at: 2026-08-11T13:47:14Z
• Report count: 41 files

Status

in-development — this PR remains a draft while .NET 11 RC 1 is the in-development frontier on main.

Related API proposals

[!NOTE]
This list might not account for every API change, but every proposal shown is verified against this API diff.

• dotnet/runtime#130809 — System.Text.Json.Serialization.JsonPolymorphicAttribute.InferClosedTypePolymorphism
• dotnet/runtime#130102 — System.Net.Http.SocketsHttpConnectionEvictionContext, System.Net.Http.SocketsHttpHandler.ShouldEvictConnection
• dotnet/runtime#128871 — System.Net.Security.TlsBufferSession, System.Net.Security.TlsSession
• dotnet/runtime#117451 — System.Numerics.Complex<T>

Review checklist

Repo area owners

• ASP.NET - @dotnet/aspnet-api-review
• WinForms - @dotnet/dotnet-winforms
• WPF - @dotnet/wpf-developers @dotnet/dotnet-wpf-maintainers
• Runtime - @JulieLeeMSFT @steveisok @agocke @lewing
• Libraries - @jeffhandley @SamMonoRT @karelz

Libraries area owners

• Extensions-Caching (Microsoft.Extensions.Caching.Abstractions) @dotnet/area-extensions-caching
• Extensions-DependencyInjection (Microsoft.Extensions.DependencyInjection.Abstractions) @dotnet/area-extensions-dependencyinjection
• Extensions-Primitives (Microsoft.Extensions.Primitives) @dotnet/area-extensions-primitives
• System.Collections @dotnet/area-system-collections
• System.Diagnostics.Process @dotnet/area-system-diagnostics-process
• System.IO.Compression (System.IO.Compression, System.IO.Compression.Brotli, System.IO.Compression.ZipFile) @dotnet/area-system-io-compression
• System.Memory @dotnet/area-system-memory
• System.Net.Http @dotnet/ncl
• System.Net.NameResolution @dotnet/ncl
• System.Net.Security @dotnet/ncl @bartonjs @vcsjones
• System.Runtime @dotnet/area-system-runtime
• System.Runtime.InteropServices @dotnet/interop-contrib
• System.Runtime.Intrinsics @dotnet/area-system-runtime-intrinsics
• System.Runtime.Loader (AssemblyLoader) @agocke @elinor-fung
• System.Runtime.Numerics @dotnet/area-system-numerics
• System.Security.Cryptography @bartonjs @vcsjones @dotnet/area-system-security
• System.Text.Json @dotnet/area-system-text-json

Feedback applied

Temporary attribute exclusions: None.

Permanent exclusions added this run: None.

Feedback recorded as out of scope:

• @jeffhandley (2026-07-30): Requested excluding APIs already present in the Preview 6 → Preview 7 diff (PR API diff between .NET 11 Preview 6 and .NET 11 Preview 7 #10482). This changes the scope of the diff (would effectively reduce coverage to Preview 7 → RC 1 only), which is a diff-semantics change rather than an attribute or assembly exclusion. Out of scope for automation — a team member would need to reconfigure the diff track or manually adjust the reports.

Automation state

# api-diff:state:begin
# api-diff-marker: 11.0-preview.6_to_11.0-rc.1
track: "incremental"
previous-version-milestone: "11.0-preview.6"
current-version-milestone: "11.0-rc.1"
previous-version: "11.0.0-preview.6.26359.118"
current-version: "11.0.0-rc.1.26411.101"
previous-feed: "https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json"
current-feed: "https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet11/nuget/v3/index.json"
status: "in-development"
report-count: 41
generated-at: "2026-08-11T13:47:14Z"
temporary-attributes-excluded: []
# api-diff:state:end

Generated by API Diff Worker · 92.5 AIC · ⌖ 5.69 AIC · ⊞ 11.2K · ◷

[jeffhandley]

We should exclude everything in here that is part of the API diff between .NET 11 Preview 6 and .NET 11 Preview 7 (#10482).

Once that PR merges, I expect this PR will get updated or replaced to become a diff between .NET 11 Preview 7 and .NET 11 RC 1.

[github-actions]

Commit pushed: 811b50c

Generated by API Diff Worker · 50.2 AIC · ⌖ 5.55 AIC · ⊞ 11.2K

[github-actions]

Commit pushed: e0096b9

Generated by API Diff Worker · 83 AIC · ⌖ 5.28 AIC · ⊞ 11.2K

[github-actions]

Commit pushed: 202425b

Generated by API Diff Worker · 52.8 AIC · ⌖ 5.14 AIC · ⊞ 11.2K

[github-actions]

Commit pushed: 97c1ebd

Generated by API Diff Worker · 92.5 AIC · ⌖ 5.69 AIC · ⊞ 11.2K

[jeffhandley]

Closing to be replaced with a Preview 7 to RC1 diff. I'll follow up separately on the agentic workflow to work on having it avoid these "leaps" going forward.