.NET: [Bug]: missing method GetResponseClient

[massnonn]

Description

on the guide https://learn.microsoft.com/en-us/agent-framework/agents/providers/azure-openai?pivots=programming-language-csharp is present example code which describe is recommended use Responses. this is the example :
AzureOpenAIClient client = new AzureOpenAIClient(
new Uri("https://.openai.azure.com"),
new DefaultAzureCredential());
var responsesClient = client.GetResponseClient("gpt-4o-mini");

AIAgent agent = responsesClient.AsAIAgent(
instructions: "You are a helpful coding assistant.",
name: "CodeHelper");

Console.WriteLine(await agent.RunAsync("Write a Python function to sort a list."));
But the method GetResponseClient is not present but only GetResponsesClient without arguments

Code Sample

AzureOpenAIClient client = new AzureOpenAIClient(
    new Uri("https://<myresource>.openai.azure.com"),
    new DefaultAzureCredential());
var responsesClient = client.GetResponseClient("gpt-4o-mini");

AIAgent agent = responsesClient.AsAIAgent(
    instructions: "You are a helpful coding assistant.",
    name: "CodeHelper");

Console.WriteLine(await agent.RunAsync("Write a Python function to sort a list."));

Error Messages / Stack Traces

not definition present for GetResponseClient

Package Versions

Azure.AI.OpenAI Version="2.9.0-beta.1" Azure.Identity" Version="1.21.0" Microsoft.Agents.AI.OpenAI Version="1.9.0"

.NET Version

NET 10

Additional Context

No response

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🤖 Automated triage reproduction notes (agent-authored — trust but verify)

Agent analysis

The external Microsoft Learn documentation at https://learn.microsoft.com/en-us/agent-framework/agents/providers/azure-openai shows client.GetResponseClient("gpt-4o-mini") but the correct API (used in all repo samples like dotnet/samples/02-agents/AgentProviders/Agent_With_AzureOpenAIResponses/Program.cs) is client.GetResponsesClient().AsAIAgent(model: "gpt-4o-mini", ...). The docs source for this page is not in this repository; the fix requires updating the learn.microsoft.com content to use the plural method name without arguments and pass the model to AsAIAgent instead.

• Failing test: none
• Files examined: dotnet/src/Microsoft.Agents.AI.OpenAI/Extensions/OpenAIResponseClientExtensions.cs, dotnet/samples/02-agents/AgentProviders/Agent_With_AzureOpenAIResponses/Program.cs, dotnet/samples/01-get-started/01_hello_agent/Program.cs, dotnet/Directory.Packages.props, dotnet/nuget/nuget-package.props
• Tests run: none
• Reported version: 1.9.0
• Current version: 1.9.0