Context

Describe the context or motivation for this PR. Include links to any related Azure DevOps Work Items or GitHub issues.
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Depends on dotnet/sdk#50673

Task Name

DotNetCoreCLI

Description

In past, we added support for dotnet.config (this was shipped during .NET 10 previews, and will be shipped in RC1 as well).

However, starting from RC2 (if the dotnet/sdk PR above is merged), we will be dropping dotnet.config completely, and switching to global.json. This PR updates the DotNetCoreCLI task to read global.json instead of dotnet.config.

Risk Assessment (Low / Medium / High)

Low. This is a .NET 10 feature that didn't yet ship in GA and has very low number of users.

Change Behind Feature Flag (Yes / No)

Can this change be behind feature flag, if not why?

There is already a feature flag in this code path.

Tech Design / Approach

Instead of parsing dotnet.config as TOML, we parse now global.json.

Documentation Changes Required (Yes/No)

Indicate whether related documentation needs to be updated.

• User guides, API specs, system diagrams, or runbooks are updated.

Unit Tests Added or Updated (Yes / No)

Indicate whether unit tests were added or modified to reflect these changes.

Tested manually.

Additional Testing Performed

List all other tests performed (manual or automated, including integration, regression, scenario tests, etc.).

Tested manually.

Logging Added/Updated (Yes/No)

Debug logging is added.

Telemetry Added/Updated (Yes/No)

No

Rollback Scenario and Process (Yes/No)

No

Dependency Impact Assessed and Regression Tested (Yes/No)

• All impacted internal modules, APIs, services, and third-party libraries are analyzed.
• Results are reviewed and confirmed to not break existing functionality.

Checklist

• Related issue linked (if applicable)
• Task version was bumped — see versioning guide
• Verified the task behaves as expected