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Update roslyn to 5.12.0-1.26459.1 - #9743

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Update roslyn to 5.12.0-1.26459.1#9743
dibarbet wants to merge 2 commits into
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dibarbet-update-roslyn-5-12-0-1-26459-1

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@dibarbet dibarbet commented Sep 9, 2026

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Roslyn build: dotnet-roslyn-official build 3070675

View Complete Diff of Changes

  • Correct stale Roslyn guidance references (PR: #85211)
  • Trigger CI on PRs to dev/* branches (PR: #85216)
  • Remove instructions causing unecessary updates to instructions files (PR: #85214)
  • Test for line endings and long paths (PR: #85127)
  • Include NuGet.config in Helix test payloads (PR: #85210)
  • Fix missing PDBs in Editorconfig DLLs (PR: #85192)
  • Centralize Language Server workspace folder tracking (PR: #85105)
  • Delete the DiagnosticsToolWindow (PR: #85152)
  • Import EditorConfig templates from dotnet/templates (PR: #85157)
  • Improve parser recovery for misplaced 'partial' modifiers (PR: #83216)
  • Add instructions for how to build with analyzers (PR: #83228)
  • Make VB SDK samples strict (Option Strict On) (PR: #85124)
  • Sync FBA sources (PR: #85065)
  • Record partial lambda parsing baselines (PR: #85166)
  • Visit left operand conversion in a fast path of nullable analysis (PR: #85115)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 8742256 (PR: #799)
  • Fix EditorConfig at solution level (PR: #782)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 6347393 (PR: #678)
  • enable nullable (PR: #692)
  • Fix a NullReferenceException in the DeclarePublicAPI analyzer (PR: #677)
  • Merge pull request Have a keyboard shortcut for the yellow bulb options (help) #644 from jmarolf/features/update-default-editorconfig-settings (PR: #644)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4901452 (PR: #511)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4901402 (PR: #510)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4900535 (PR: #509)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4905189 (PR: #512)
  • Set VSSDKTargetPlatformRegRootSuffix (PR: #461)
  • Update VS SDK (PR: #487)
  • Update VSSDK (PR: #479)
  • Localized file check-in by OneLocBuild Task: Build definition ID 10077: Build ID 4718492 (PR: #478)
  • Fix Editor config issues (PR: #206)
  • fix EditorConfig templates names (PR: #193)
  • Fix vs dev (PR: #134)
  • Add new classlib templates (PR: #132)
  • do not build tasks and use nuget package instead (PR: #92)
  • move-to-arcade (PR: #90)
  • Correcting two option names
    (PR: #83)
  • Trim trailing whitespace in EditorConfig item templates (PR: #73)
  • Update editorconfig default name (PR: #65)
  • Fix access to resources (PR: #64)
  • LOC CHECKIN | dotnet/templates master | 20180629 (PR: #61)
  • adding VB editorconfig templates (PR: #56)
  • Merge dev15.8 preview2 to master (PR: #55)
  • fix setup (PR: #54)
  • Merges/dev15.8 preview2 to master (PR: #52)
  • Update setup authoring (PR: #50)
  • Merges/dev15.7.x to dev15.8 preview2 (PR: #48)
  • reset to defaults (PR: #47)
  • Fix aspnet node order (PR: #46)
  • Merges/dev15.8 preview2 to master (PR: #45)
  • Refactor (PR: #44)
  • update vb authoring (PR: #41)
  • adding localized resources (PR: #40)
  • fixing Kaseys comments (PR: #39)
  • Editorconifg changes (PR: #38)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
@dibarbet
dibarbet requested a review from a team as a code owner September 9, 2026 17:56
Copilot AI lite review requested due to automatic review settings September 9, 2026 17:56
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

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Copilot review overview

🟡 Changes recommended

The new changelog sub-bullet appears to describe an ambiguous internal refactor and should be omitted or rewritten to reflect a clearly user-visible impact per the repo’s Roslyn-update changelog guidance.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Review tier: Lite
Findings: 1 Low severity

New issues introduced by this change (1)
Severity Finding
Low severity CHANGELOG.md — The nested entry “Centralize Language Server workspace folder tracking” reads like an internal…
What changed in this PR

Updates the default Roslyn component version used by the VS Code C# extension and records the bump in the repository changelog.

Changes:

  • Bump the default Roslyn version to 5.12.0-1.26459.1.
  • Add a corresponding CHANGELOG.md entry for the Roslyn update.
File Description
package.json Updates the default Roslyn component version string.
CHANGELOG.md Adds a new 2.152.x changelog entry for the Roslyn version bump.

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Comment thread CHANGELOG.md
Comment on lines +8 to +9
* Update Roslyn to 5.12.0-1.26459.1 (PR: [#9743](https://github.com/dotnet/vscode-csharp/pull/9743))
* Centralize Language Server workspace folder tracking (PR: [#85105](https://github.com/dotnet/roslyn/pull/85105))
@dibarbet dibarbet closed this Sep 9, 2026
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