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* Initial plan * Update HostedAgents samples to Azure.AI.AgentServer.AgentFramework 1.0.0-beta.9 and MEAI 10.3.0 Co-authored-by: rogerbarreto <19890735+rogerbarreto@users.noreply.github.com> * Fix HostedAgents samples for Microsoft.Agents.AI 1.0.0-rc2 API changes - Rename CreateAIAgent -> AsAIAgent (AgentThreadAndHITL, AgentWithHostedMCP, AgentWithTextSearchRag) - Rename AsAgent -> AsAIAgent (AgentsInWorkflows) - Replace AIContextProviderFactory with AIContextProviders and simplified TextSearchProvider ctor (AgentWithTextSearchRag) - Update Microsoft.Agents.AI.OpenAI to 1.0.0-rc2 (AgentThreadAndHITL, AgentWithTextSearchRag, AgentWithTools) - Update Microsoft.Agents.AI.Workflows to 1.0.0-rc2 (AgentsInWorkflows) - Add Microsoft.Agents.AI 1.0.0-rc2 reference (AgentWithHostedMCP) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Update HostedAgents samples for beta.9 API changes and add missing projects to slnx - Use DefaultAzureCredential consistently across all samples - Add AgentThreadAndHITL, AgentWithLocalTools, AgentWithTools to slnx - Apply dotnet format Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Remove unnecessary Microsoft.Agents.AI.* package references (transitive from AgentFramework) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Add DefaultAzureCredential production warning comments to all HostedAgents samples Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Update HostedAgents READMEs to reflect DefaultAzureCredential usage Replace AzureCliCredential references with DefaultAzureCredential in all HostedAgents README files to match the actual sample code. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Replace Microsoft.Extensions.AI.OpenAI with Microsoft.Agents.AI.OpenAI and remove AsIChatClient() Swap package references from Microsoft.Extensions.AI.OpenAI to Microsoft.Agents.AI.OpenAI across all 6 HostedAgents samples. This enables using the AsAIAgent() extension directly on ChatClient/ResponsesClient (from OpenAI.Chat/OpenAI.Responses namespaces), removing the intermediate AsIChatClient() call in 3 samples where it was unnecessary. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Use explicit types and AsAIAgent() extensions across all HostedAgents samples Replace var with explicit types for clarity in all 6 samples. Replace new ChatClientAgent() constructor calls with chatClient.AsAIAgent() extension method in AgentWithLocalTools and AgentsInWorkflows. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: rogerbarreto <19890735+rogerbarreto@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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What this sample demonstrates
This sample demonstrates how to build a hosted agent that uses local C# function tools — a key advantage of code-based hosted agents over prompt agents. The agent acts as a Seattle travel assistant with a GetAvailableHotels tool that simulates querying a hotel availability API.
Key features:
- Defining local C# functions as agent tools using
AIFunctionFactory - Using
AIProjectClientto discover the OpenAI connection from the Azure AI Foundry project - Building a
ChatClientAgentwith custom instructions and tools - Deploying to the Foundry Hosted Agent service
For common prerequisites and setup instructions, see the Hosted Agent Samples README.
Prerequisites
Before running this sample, ensure you have:
- .NET 10 SDK installed
- An Azure AI Foundry Project with a chat model deployed (e.g., gpt-4o-mini)
- Azure CLI installed and authenticated (
az login)
Environment Variables
Set the following environment variables:
# Replace with your Azure AI Foundry project endpoint
$env:AZURE_AI_PROJECT_ENDPOINT="https://your-project.services.ai.azure.com/api/projects/your-project-name"
# Optional, defaults to gpt-4o-mini
$env:MODEL_DEPLOYMENT_NAME="gpt-4o-mini"
How It Works
- The agent uses
AIProjectClientto discover the Azure OpenAI connection from the project endpoint - A local C# function
GetAvailableHotelsis registered as a tool usingAIFunctionFactory.Create - When users ask about hotels, the model invokes the local tool to search simulated hotel data
- The tool filters hotels by price and calculates total costs based on the requested dates
- Results are returned to the model, which presents them in a conversational format