[LI (ktz03)]

Motivation & Context

The AG-UI sample guide lists .NET 9 even though the getting-started server and client target net10.0. Its connection-refused instructions also reference two directories that no longer exist, preventing readers from following the documented startup steps.

Description & Review Guide

• What are the major changes? Require the .NET 10 SDK and point the troubleshooting commands to Step01_GettingStarted/Server and Step01_GettingStarted/Client.
• What is the impact of these changes? Three documentation lines change; sample behavior is unchanged.
• What do you want reviewers to focus on? The SDK prerequisite matches both project files, and the commands match the existing Step01 sample directories and the guide's earlier instructions. Static directory, project-target and unchanged-entry checks passed against a8e284c. No .NET SDK build, sample execution, cloud call or product test was run.

Related Issue

N/A - trivial change. These are unambiguous corrections to the guide's setup requirements and obsolete paths. #9581 fixes different MCP and telemetry guides; #8550 and #5216 add other AG-UI sections without changing these instructions.

AI Assistance

• No material AI assistance was used.
• This is an AI-assisted contribution. I reviewed, understood, and verified all submitted content and accept responsibility for it.

AI assistance details: Documentation, static verification, and this PR description.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR links to an agreed issue with no competing open PR, or the Related Issue section documents a trivial-change or repository-automation exception.
• This is not a breaking change.

[Copilot]

🟢 Approval recommended

The three documentation corrections match the project targets and existing sample directories, with no unresolved issues.

No open issues 🎉

What changed in this PR

Corrects the .NET AG-UI sample guide’s setup requirements and troubleshooting commands without changing sample behavior.

Changes:

• Updates the prerequisite to .NET 10.0 SDK or later to match the getting-started projects.
• Replaces obsolete server and client paths with the existing Step01_GettingStarted directories.

File	Description
dotnet/​samples/​02-agents/​AGUI/​README.md	Corrects the SDK prerequisite and both troubleshooting startup paths.

_{Review effort: Balanced}

[Vincent Biret (baywet)]

Thanks for the contribution!