ai-agents-for-beginners

🎨 Azure OpenAI (Responses API) (.NET) āϏāĻš āĻāĻœā§‡āĻ¨ā§āϟāĻŋāĻ• āĻĄāĻŋāϜāĻžāχāύ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

📋 āĻļ⧇āĻ–āĻžāϰ āϞāĻ•ā§āĻˇā§āϝ

āĻāχ āωāĻĻāĻžāĻšāϰāĻŖāϟāĻŋ .NET āĻ Microsoft Agent Framework āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰ⧇ āĻāĻŦāĻ‚ Azure OpenAI (Responses API) āĻāϕ⧀āĻ­ā§‚āϤāĻ•āϰāϪ⧇āϰ āĻŽāĻžāĻ§ā§āϝāĻŽā§‡ āĻŦ⧁āĻĻā§āϧāĻŋāĻŽāĻžāύ āĻāĻœā§‡āĻ¨ā§āϟ āϤ⧈āϰāĻŋ āĻ•āϰāĻžāϰ āϜāĻ¨ā§āϝ āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ-āĻ—ā§āϰ⧇āĻĄ āĻĄāĻŋāϜāĻžāχāύ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύāϗ⧁āϞāĻŋ āĻĒā§āϰāĻĻāĻ°ā§āĻļāύ āĻ•āϰ⧇āĨ¤ āφāĻĒāύāĻŋ āĻĒ⧇āĻļāĻžāĻĻāĻžāϰ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ āĻāĻŦāĻ‚ āĻ¸ā§āĻĨāĻžāĻĒāĻ¤ā§āϝāĻ—āϤ āĻĒāĻ¨ā§āĻĨāĻž āĻļāĻŋāĻ–āĻŦ⧇āύ āϝāĻž āĻāĻœā§‡āĻ¨ā§āϟāϕ⧇ āĻ‰ā§ŽāĻĒāĻžāĻĻāύ-āĻĒāĻ°ā§āϝāĻžā§Ÿāϝ⧋āĻ—ā§āϝ, āϰāĻ•ā§āώāĻŖāĻžāĻŦ⧇āĻ•ā§āώāĻŖāϝ⧋āĻ—ā§āϝ āĻāĻŦāĻ‚ āĻ¸ā§āϕ⧇āϞāϝ⧋āĻ—ā§āϝ āĻ•āϰ⧇ āϤ⧋āϞ⧇āĨ¤

āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ āĻĄāĻŋāϜāĻžāχāύ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

đŸŽ¯ .NET-āύāĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āϟ āĻ¸ā§āĻĨāĻžāĻĒāĻ¤ā§āϝāĻ—āϤ āϏ⧁āĻŦāĻŋāϧāĻž

āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ āĻŦ⧈āĻļāĻŋāĻˇā§āĻŸā§āϝ

āĻ‰ā§ŽāĻĒāĻžāĻĻāύ-āĻĒāĻ°ā§āϝāĻžā§Ÿ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύāϗ⧁āϞ⧋

🔧 āĻĒā§āϰāϝ⧁āĻ•ā§āϤāĻŋāĻ—āϤ āĻ¸ā§āĻĨāĻžāĻĒāĻ¤ā§āϝ

āĻŽā§‚āϞ .NET āωāĻĒāĻžāĻĻāĻžāύāϏāĻŽā§‚āĻš

āĻĄāĻŋāϜāĻžāχāύ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ āĻŦāĻžāĻ¸ā§āϤāĻŦāĻžāϝāĻŧāύ

graph LR
    A[IServiceCollection] --> B[āĻāĻœā§‡āĻ¨ā§āϟ āĻŦāĻŋāĻ˛ā§āĻĄāĻžāϰ]
    B --> C[āĻ•āύāĻĢāĻŋāĻ—āĻžāϰ⧇āĻļāύ]
    C --> D[āϟ⧁āϞ āϰ⧇āϜāĻŋāĻ¸ā§āĻŸā§āϰāĻŋ]
    D --> E[āĻāφāχ āĻāĻœā§‡āĻ¨ā§āϟ]

đŸ—ī¸ āĻĒā§āϰāĻĻāĻ°ā§āĻļāĻŋāϤ āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

ā§§. āϏ⧃āĻˇā§āϟāĻŋāĻ—āϤ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

⧍. āφāϚāϰāĻŖāĻ—āϤ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

ā§Š. āĻ—āĻ āύāĻ—āϤ āĻĒā§āϝāĻžāϟāĻžāĻ°ā§āύ

📚 .NET āĻĄāĻŋāϜāĻžāχāύ āύ⧀āϤāĻŋāĻŽāĻžāϞāĻž

SOLID āύ⧀āϤāĻŋāĻŽāĻžāϞāĻž

āĻ•ā§āϞāĻŋāύ āφāĻ°ā§āĻ•āĻŋāĻŸā§‡āĻ•āϚāĻžāϰ

🔒 āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ āĻŦāĻŋāĻŦ⧇āϚāύāĻž

āϏāĻŋāĻ•āĻŋāωāϰāĻŋāϟāĻŋ

āĻ•āĻ°ā§āĻŽāĻ•ā§āώāĻŽāϤāĻž

āĻ¸ā§āϕ⧇āϞāϝ⧋āĻ—ā§āϝāϤāĻž

🚀 āĻ‰ā§ŽāĻĒāĻžāĻĻāύ āĻ¸ā§āĻĨāĻžāĻĒāύ

.NET āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰ⧇ āĻāĻ¨ā§āϟāĻžāϰāĻĒā§āϰāĻžāχāϜ-āĻ—ā§āϰ⧇āĻĄ āĻŦ⧁āĻĻā§āϧāĻŋāĻŽāĻžāύ āĻāĻœā§‡āĻ¨ā§āϟ āϤ⧈āϰāĻŋ āĻ•āϰāϤ⧇ āĻĒā§āϰāĻ¸ā§āϤ⧁āϤ? āϚāϞ⧁āύ āĻ•āĻŋāϛ⧁ āĻļāĻ•ā§āϤāĻŋāĻļāĻžāϞ⧀ āĻ¸ā§āĻĨāĻžāĻĒāĻ¤ā§āϝ āϤ⧈āϰāĻŋ āĻ•āϰāĻŋ! đŸĸ✨

🚀 āĻļ⧁āϰ⧁ āĻ•āϰāĻž

āĻĒā§‚āĻ°ā§āĻŦāĻļāĻ°ā§āϤ

āĻĒā§āϰāϝāĻŧā§‹āϜāύ⧀āϝāĻŧ āĻĒāϰāĻŋāĻŦ⧇āĻļ āϭ⧇āϰāĻŋāϝāĻŧ⧇āĻŦāϞ

# zsh/bash
export AZURE_OPENAI_ENDPOINT=https://<your-resource>.openai.azure.com
export AZURE_OPENAI_DEPLOYMENT=gpt-5-mini
# āϤāĻžāϰāĻĒāϰ āϏāĻžāχāύ āχāύ āĻ•āϰ⧁āύ āϝāĻžāϤ⧇ AzureCliCredential āĻāĻ•āϟāĻŋ āĻŸā§‹āϕ⧇āύ āĻĒ⧇āϤ⧇ āĻĒāĻžāϰ⧇
az login
# āĻĒāĻžāĻ“ā§ŸāĻžāϰāĻļ⧇āϞ
$env:AZURE_OPENAI_ENDPOINT = "https://<your-resource>.openai.azure.com"
$env:AZURE_OPENAI_DEPLOYMENT = "gpt-5-mini"
# āϤāĻžāϰāĻĒāϰ āϏāĻžāχāύ āχāύ āĻ•āϰ⧁āύ āϝāĻžāϤ⧇ AzureCliCredential āĻāĻ•āϟāĻŋ āĻŸā§‹āϕ⧇āύ āĻĒ⧇āϤ⧇ āĻĒāĻžāϰ⧇
az login

āύāĻŽā§āύāĻž āϕ⧋āĻĄ

āϕ⧋āĻĄ āωāĻĻāĻžāĻšāϰāĻŖ āϚāĻžāϞāĻžāϤ⧇,

# āĻœā§‡āĻĄāĻļ/āĻŦā§āϝāĻžāĻļ
chmod +x ./03-dotnet-agent-framework.cs
./03-dotnet-agent-framework.cs

āĻ…āĻĨāĻŦāĻž dotnet CLI āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰ⧁āύ:

dotnet run ./03-dotnet-agent-framework.cs

āϏāĻŽā§āĻĒā§‚āĻ°ā§āĻŖ āϕ⧋āĻĄā§‡āϰ āϜāĻ¨ā§āϝ āĻĻ⧇āϖ⧁āύ 03-dotnet-agent-framework.csāĨ¤

#!/usr/bin/dotnet run

#:package Microsoft.Extensions.AI@10.*
#:package Microsoft.Agents.AI.OpenAI@1.*-*
#:package Azure.AI.OpenAI@2.1.0
#:package Azure.Identity@1.13.1

using System.ComponentModel;

using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;

using Azure.AI.OpenAI;
using Azure.Identity;

// Tool Function: Random Destination Generator
// This static method will be available to the agent as a callable tool
// The [Description] attribute helps the AI understand when to use this function
// This demonstrates how to create custom tools for AI agents
[Description("Provides a random vacation destination.")]
static string GetRandomDestination()
{
    // List of popular vacation destinations around the world
    // The agent will randomly select from these options
    var destinations = new List<string>
    {
        "Paris, France",
        "Tokyo, Japan",
        "New York City, USA",
        "Sydney, Australia",
        "Rome, Italy",
        "Barcelona, Spain",
        "Cape Town, South Africa",
        "Rio de Janeiro, Brazil",
        "Bangkok, Thailand",
        "Vancouver, Canada"
    };

    // Generate random index and return selected destination
    // Uses System.Random for simple random selection
    var random = new Random();
    int index = random.Next(destinations.Count);
    return destinations[index];
}

// Azure OpenAI with the Responses API (stable v1 endpoint). Sign in with `az login`.
var azureEndpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT")
    ?? throw new InvalidOperationException("AZURE_OPENAI_ENDPOINT is not set.");
var deployment = Environment.GetEnvironmentVariable("AZURE_OPENAI_DEPLOYMENT") ?? "gpt-5-mini";

var azureClient = new AzureOpenAIClient(new Uri(azureEndpoint), new AzureCliCredential());

// Define Agent Identity and Comprehensive Instructions
// Agent name for identification and logging purposes
var AGENT_NAME = "TravelAgent";

// Detailed instructions that define the agent's personality, capabilities, and behavior
// This system prompt shapes how the agent responds and interacts with users
var AGENT_INSTRUCTIONS = """
You are a helpful AI Agent that can help plan vacations for customers.

Important: When users specify a destination, always plan for that location. Only suggest random destinations when the user hasn't specified a preference.

When the conversation begins, introduce yourself with this message:
"Hello! I'm your TravelAgent assistant. I can help plan vacations and suggest interesting destinations for you. Here are some things you can ask me:
1. Plan a day trip to a specific location
2. Suggest a random vacation destination
3. Find destinations with specific features (beaches, mountains, historical sites, etc.)
4. Plan an alternative trip if you don't like my first suggestion

What kind of trip would you like me to help you plan today?"

Always prioritize user preferences. If they mention a specific destination like "Bali" or "Paris," focus your planning on that location rather than suggesting alternatives.
""";

// Create AI Agent with Advanced Travel Planning Capabilities
// Get the Responses client for the deployment and create the AI agent
// Configure agent with name, detailed instructions, and available tools
// This demonstrates the .NET agent creation pattern with full configuration
AIAgent agent = azureClient
    .GetChatClient(deployment)
    .AsAIAgent(
        name: AGENT_NAME,
        instructions: AGENT_INSTRUCTIONS,
        tools: [AIFunctionFactory.Create(GetRandomDestination)]
    );

// Create New Conversation Session for Context Management
// Initialize a new conversation session to maintain context across multiple interactions
// Sessions enable the agent to remember previous exchanges and maintain conversational state
// This is essential for multi-turn conversations and contextual understanding
var session = await agent.CreateSessionAsync();

// Execute Agent: First Travel Planning Request
// Run the agent with an initial request that will likely trigger the random destination tool
// The agent will analyze the request, use the GetRandomDestination tool, and create an itinerary
// Using the session parameter maintains conversation context for subsequent interactions
await foreach (var update in agent.RunStreamingAsync("Plan me a day trip", session))
{
    await Task.Delay(10);
    Console.Write(update);
}

Console.WriteLine();

// Execute Agent: Follow-up Request with Context Awareness
// Demonstrate contextual conversation by referencing the previous response
// The agent remembers the previous destination suggestion and will provide an alternative
// This showcases the power of conversation sessions and contextual understanding in .NET agents
await foreach (var update in agent.RunStreamingAsync("I don't like that destination. Plan me another vacation.", session))
{
    await Task.Delay(10);
    Console.Write(update);
}

āĻ…āĻ¸ā§āĻŦā§€āĻ•ā§ƒāϤāĻŋ: āĻāχ āύāĻĨāĻŋāϟāĻŋ AI āĻ…āύ⧁āĻŦāĻžāĻĻ āĻĒāϰāĻŋāώ⧇āĻŦāĻž Co-op Translator āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰ⧇ āĻ…āύ⧂āĻĻāĻŋāϤ āĻšāϝāĻŧ⧇āϛ⧇āĨ¤ āϝāĻĻāĻŋāĻ“ āφāĻŽāϰāĻž āĻļ⧁āĻĻā§āϧāϤāĻžāϰ āϜāĻ¨ā§āϝ āĻšā§‡āĻˇā§āϟāĻž āĻ•āϰāĻŋ, āĻ…āύ⧁āĻ—ā§āϰāĻš āĻ•āϰ⧇ āĻŽāύ⧇ āϰāĻžāĻ–āĻŦ⧇āύ āϝ⧇ āĻ¸ā§āĻŦāϝāĻŧāĻ‚āĻ•ā§āϰāĻŋāϝāĻŧ āĻ…āύ⧁āĻŦāĻžāĻĻ⧇ āĻ¤ā§āϰ⧁āϟāĻŋ āĻŦāĻž āĻ…āϏāĻ™ā§āĻ—āϤāĻŋ āĻĨāĻžāĻ•āϤ⧇ āĻĒāĻžāϰ⧇āĨ¤ āĻŽā§‚āϞ āύāĻĨāĻŋāϟāĻŋ āϤāĻžāϰ āĻ¸ā§āĻŦāĻ­āĻžāώāĻžāϝāĻŧ āĻ•āĻ°ā§āϤ⧃āĻ¤ā§āĻŦāĻĒā§‚āĻ°ā§āĻŖ āĻ‰ā§ŽāϏ āĻšāĻŋāϏ⧇āĻŦ⧇ āĻŦāĻŋāĻŦ⧇āϚāĻŋāϤ āĻšāĻ“āϝāĻŧāĻž āωāϚāĻŋāϤāĨ¤ āϗ⧁āϰ⧁āĻ¤ā§āĻŦāĻĒā§‚āĻ°ā§āĻŖ āϤāĻĨā§āϝ⧇āϰ āϜāĻ¨ā§āϝ āĻĒ⧇āĻļāĻžāĻĻāĻžāϰ āĻŽāĻžāύāĻŦ āĻ…āύ⧁āĻŦāĻžāĻĻ āϏ⧁āĻĒāĻžāϰāĻŋāĻļ āĻ•āϰāĻž āĻšāϝāĻŧāĨ¤ āĻāχ āĻ…āύ⧁āĻŦāĻžāĻĻ⧇āϰ āĻŦā§āϝāĻŦāĻšāĻžāϰ⧇ āĻĒā§āϰāϝāĻŧā§‹āϜāύ⧀āϝāĻŧ āϭ⧁āϞ āĻŦā§‹āĻāĻžāĻŦ⧁āĻāĻŋ āĻŦāĻž āϭ⧁āϞ āĻŦā§āϝāĻžāĻ–ā§āϝāĻžāϰ āϜāĻ¨ā§āϝ āφāĻŽāϰāĻž āĻĻāĻžāϝāĻŧāĻŦāĻĻā§āϧ āύāχāĨ¤