Files
agent-framework/dotnet
T
alliscode 5791203d77 Fix function_call_output.output to be a JSON string on the wire
OutputConverter was passing the JSON serialization of complex tool results (e.g. List<TodoItem>) directly into OutputItemFunctionToolCallOutput via BinaryData.FromString. The Responses SDK treats that BinaryData as the *raw JSON value* for the field, so non-string results landed on the wire as an unquoted JSON array (e.g. `"output":[{...}]`) instead of a JSON string.

The OpenAI Responses spec requires `function_call_output.output` to be a JSON string. The strict-parsing OpenAI .NET client (FunctionCallOutputResponseItem) consequently failed when threading a follow-up turn that replayed such an item, with: `The JSON value could not be converted... requires an element of type 'String', but the target element has type 'Array'`.

Always wrap the payload as a JSON string literal:

  - string s   -> JSON-encode s (quoted, with escapes)

  - object o   -> JSON-serialize o, then JSON-encode the resulting text

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
5791203d77 · 2026-05-07 13:58:00 -07:00
History
..
2026-05-05 09:23:36 +00:00
2026-04-03 11:27:36 +00:00

Get Started with Microsoft Agent Framework for C# Developers

Quickstart

Basic Agent - .NET

using Azure.AI.OpenAI;
using Azure.Identity;
using Microsoft.Agents.AI;
using OpenAI.Responses;

var endpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT")!;
var deploymentName = Environment.GetEnvironmentVariable("AZURE_OPENAI_DEPLOYMENT_NAME")!;

var agent = new AzureOpenAIClient(new Uri(endpoint), new AzureCliCredential())
    .GetResponsesClient(deploymentName)
    .AsAIAgent(name: "HaikuBot", instructions: "You are an upbeat assistant that writes beautifully.");

Console.WriteLine(await agent.RunAsync("Write a haiku about Microsoft Agent Framework."));

Examples & Samples

Agent Framework Documentation