chore: import upstream snapshot with attribution

dotnet/samples/02-agents/AgentProviders/foundry/Agent_Step14_CodeInterpreter/Agent_Step14_CodeInterpreter.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFrameworks>net10.0</TargetFrameworks>
+
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Azure.Identity" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\..\src\Microsoft.Agents.AI.Foundry\Microsoft.Agents.AI.Foundry.csproj" />
+  </ItemGroup>
+
+</Project>

dotnet/samples/02-agents/AgentProviders/foundry/Agent_Step14_CodeInterpreter/Program.cs

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+// Copyright (c) Microsoft. All rights reserved.
+
+// This sample shows how to use Code Interpreter Tool with AIProjectClient.AsAIAgent(...).
+
+using System.Text;
+using Azure.AI.Projects;
+using Azure.Identity;
+using Microsoft.Agents.AI;
+using Microsoft.Extensions.AI;
+using OpenAI.Assistants;
+using OpenAI.Responses;
+
+const string AgentInstructions = "You are a personal math tutor. When asked a math question, write and run code using the python tool to answer the question.";
+const string AgentName = "CoderAgent-RAPI";
+
+string endpoint = Environment.GetEnvironmentVariable("FOUNDRY_PROJECT_ENDPOINT") ?? throw new InvalidOperationException("FOUNDRY_PROJECT_ENDPOINT is not set.");
+string deploymentName = Environment.GetEnvironmentVariable("FOUNDRY_MODEL") ?? "gpt-5.4-mini";
+
+// WARNING: DefaultAzureCredential is convenient for development but requires careful consideration in production.
+// In production, consider using a specific credential (e.g., ManagedIdentityCredential) to avoid
+// latency issues, unintended credential probing, and potential security risks from fallback mechanisms.
+AIProjectClient aiProjectClient = new(new Uri(endpoint), new DefaultAzureCredential());
+
+// The easiest way to add the hosted code interpreter is as follows:
+/*
+AIAgent agent = aiProjectClient.AsAIAgent(
+    deploymentName,
+    instructions: AgentInstructions,
+    name: AgentName,
+    tools: [new HostedCodeInterpreterTool() { Inputs = [] }]);
+*/
+
+// However, by default the reponses API does not return the output items from the hosted code interpreter tool.
+// This is generally fine but for this sample we want to explicitly request those in the response generation configuration.
+AIAgent agent = aiProjectClient
+    .GetProjectOpenAIClient()
+    .GetProjectResponsesClient()
+    .AsIChatClient(deploymentName)
+    .AsBuilder()
+    .ConfigureOptions(x =>
+    {
+        var previousFactory = x.RawRepresentationFactory;
+        x.RawRepresentationFactory = state =>
+        {
+            var responseOptions = previousFactory?.Invoke(state) as CreateResponseOptions ?? new CreateResponseOptions();
+
+            // Ensure that the response includes tool output items from the hosted code interpreter
+            responseOptions.IncludedProperties.Add(IncludedResponseProperty.CodeInterpreterCallOutputs);
+
+            return responseOptions;
+        };
+    })
+    .Build()
+    .AsAIAgent(
+    instructions: AgentInstructions,
+    name: AgentName,
+    tools: [new HostedCodeInterpreterTool() { Inputs = [] }]);
+
+AgentResponse response = await agent.RunAsync("I need to solve the equation sin(x) + x^2 = 42");
+
+// Get the CodeInterpreterToolCallContent
+CodeInterpreterToolCallContent? toolCallContent = response.Messages.SelectMany(m => m.Contents).OfType<CodeInterpreterToolCallContent>().FirstOrDefault();
+if (toolCallContent?.Inputs is not null)
+{
+    DataContent? codeInput = toolCallContent.Inputs.OfType<DataContent>().FirstOrDefault();
+    if (codeInput?.HasTopLevelMediaType("text") ?? false)
+    {
+        Console.WriteLine($"Code Input: {Encoding.UTF8.GetString(codeInput.Data.ToArray()) ?? "Not available"}");
+    }
+}
+
+// Get the CodeInterpreterToolResultContent
+CodeInterpreterToolResultContent? toolResultContent = response.Messages.SelectMany(m => m.Contents).OfType<CodeInterpreterToolResultContent>().FirstOrDefault();
+if (toolResultContent?.Outputs is not null && toolResultContent.Outputs.OfType<TextContent>().FirstOrDefault() is { } resultOutput)
+{
+    Console.WriteLine($"Code Tool Result: {resultOutput.Text}");
+}
+
+// Getting any annotations generated by the tool
+foreach (AIAnnotation annotation in response.Messages.SelectMany(m => m.Contents).SelectMany(C => C.Annotations ?? []))
+{
+    if (annotation.RawRepresentation is TextAnnotationUpdate citationAnnotation)
+    {
+        Console.WriteLine($$"""
+            File Id: {{citationAnnotation.OutputFileId}}
+            Text to Replace: {{citationAnnotation.TextToReplace}}
+            Filename: {{Path.GetFileName(citationAnnotation.TextToReplace)}}
+            """);
+    }
+}

dotnet/samples/02-agents/AgentProviders/foundry/Agent_Step14_CodeInterpreter/README.md

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+# Code Interpreter with the Responses API
+
+This sample shows how to use the Code Interpreter tool with a `ChatClientAgent` using the Responses API directly.
+
+## What this sample demonstrates
+
+- Using `HostedCodeInterpreterTool` with `ChatClientAgent`
+- Extracting code input and output from agent responses
+- Handling code interpreter annotations and file citations
+
+## Prerequisites
+
+- .NET 10 SDK or later
+- Microsoft Foundry service endpoint and deployment configured
+- An authenticated Azure identity (for example, sign in with `az login`)
+
+Set the following environment variables:
+
+```powershell
+$env:FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project"
+$env:FOUNDRY_MODEL="gpt-5.4-mini"
+```
+
+## Run the sample
+
+```powershell
+dotnet run
+```
+