.NET: chore: updates Microsoft owned testing dependencies

[Vincent Biret (baywet)]

Updates testing deps in preparation for additional upgrades

[Copilot]

🟢 Approval recommended

The change is a straightforward, centrally-scoped test dependency version update with no additional behavioral code modifications.

Pull request overview

This PR updates centrally-managed .NET test dependency versions in dotnet/Directory.Packages.props to prepare the repository for upcoming dependency upgrades.

Changes:

• Bump Microsoft.NET.Test.Sdk from 18.0.0 to 18.9.0.
• Bump Microsoft.Testing.Extensions.CodeCoverage from 18.4.1 to 18.11.0.

File summaries

File	Description
dotnet/Directory.Packages.props	Updates shared versions for core .NET test SDK and code coverage tooling.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

---

💡 Add a code-review agent skill for context-aware, tailored reviews. Learn more in the docs.

[github-actions]

MAF Automated Review — Iteration 1

Result: No findings
Scope: full PR (1 commit(s)): f0073d3ec8cd
Model: gpt-5.6-sol-fast

Overview

This PR updates the centrally managed Microsoft test SDK and code-coverage extension while preserving the repository's existing xUnit v3 and Microsoft Testing Platform configuration. Common test props apply both packages consistently, and CI restores, builds, runs representative target frameworks, exercises coverage output, and enforces the coverage threshold. No publishable defect was established.

Reviewed the supplied pull-request change set across correctness, security/reliability, architecture, and failure behavior.
No publishable findings remained after source verification for this scope.

[github-code-quality]

Code Coverage Overview

Languages: C#

C# / code-coverage/dotnet

The overall line coverage in commit b9df6ac in the deps/testing-deps branch is 84%. Line coverage data for the main branch is not yet available.

Show a line coverage summary of the most covered files.

File	main	deps/testing-deps b9df6ac	+/-
/home/runner/wo...valConverter.cs	—	100%	—
/home/runner/wo...entsProvider.cs	—	99%	—
/home/runner/wo...nticAnalyzer.cs	—	94%	—
/home/runner/wo...tClientAgent.cs	—	91%	—
/home/runner/wo...putConverter.cs	—	90%	—
/home/runner/wo...kflowBuilder.cs	—	90%	—
/home/runner/wo...kflowSession.cs	—	87%	—
/home/runner/wo...SkillsSource.cs	—	86%	—
/home/runner/wo...onExtensions.cs	—	81%	—
/home/runner/wo...ctionVisitor.cs	—	70%	—

---

_{Updated September 09, 2026 12:26 UTC}