[Naveen Chatlapalli (1aifanatic)]

Motivation & Context

Two .NET sample READMEs don't match their sample code:

• 02-agents/DevUI/DevUI_Step01_BasicUsage/README.md registers a workflow with builder.AddSequentialWorkflow("my-workflow", [agent1Builder, agent2Builder]). No such extension method exists, so copying the step fails with error CS1061: 'WebApplicationBuilder' does not contain a definition for 'AddSequentialWorkflow'. The sample's Program.cs uses builder.AddWorkflow(name, (sp, key) => AgentWorkflowBuilder.BuildSequential(...)).
• 04-hosting/FoundryHostedAgents/responses/Using-Samples/SessionFilesClient/README.md says to "point it at an AGENT_ENDPOINT". The sample, and the README's own configuration section, use FOUNDRY_PROJECT_ENDPOINT and AZURE_AI_AGENT_NAME.

Description & Review Guide

• What are the major changes? README only:
  • The DevUI step 2 snippet uses AddWorkflow with AgentWorkflowBuilder.BuildSequential, resolving the two hosted agents by name as Program.cs does.
  • The SessionFilesClient intro describes the project endpoint and agent name settings.
• What is the impact of these changes? Documentation only.
• What do you want reviewers to focus on? Nothing in particular.

I compiled README steps 2 and 3 together as a Program.cs in a temporary copy of the DevUI sample project. With this change it builds with 0 warnings. With the original snippet it fails with the CS1061 error above.

Related Issue

N/A - trivial change: README snippets and wording are corrected to match the existing sample code.

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: Claude Code helped find the mismatches by comparing README code with the .NET source, update the READMEs, compile the snippet, and draft this 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. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

🤖 Generated with Claude Code

[Copilot]

🟢 Approval recommended

There are no active review issues for the documentation-only updates aligning the two .NET sample READMEs with their implementations.

No open issues 🎉

What changed in this PR

This documentation-only PR aligns two .NET sample READMEs with their existing implementations. No runtime code changes are included.

Changes:

• Replaces the nonexistent AddSequentialWorkflow call with AddWorkflow and AgentWorkflowBuilder.BuildSequential, resolving registered agents by name.
• Corrects SessionFilesClient’s introduction to describe configuration through a Foundry project and agent name.

File	Description
dotnet/​samples/​04-hosting/​FoundryHostedAgents/​responses/​Using-Samples/​SessionFilesClient/​README.md	Replaces the incorrect AGENT_ENDPOINT guidance.
dotnet/​samples/​02-agents/​DevUI/​DevUI_Step01_BasicUsage/​README.md	Updates the workflow registration snippet to match the sample code.

_{Review effort: Balanced}