m365-agents-dotnet

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# Microsoft 365 Agents SDK (.NET)

## Overview
Build enterprise agents for Microsoft 365, Teams, and Copilot Studio using the Microsoft.Agents SDK with ASP.NET Core hosting, agent routing, and MSAL-based authentication.

## Before implementation
- Use the microsoft-docs MCP to verify the latest APIs for AddAgent, AgentApplication, and authentication options.
- Confirm package versions in NuGet for the Microsoft.Agents.* packages you plan to use.

## Installation

```bash
dotnet add package Microsoft.Agents.Hosting.AspNetCore
dotnet add package Microsoft.Agents.Authentication.Msal
dotnet add package Microsoft.Agents.Storage
dotnet add package Microsoft.Agents.CopilotStudio.Client
dotnet add package Microsoft.Identity.Client.Extensions.Msal
```

## Configuration (appsettings.json)

```json
{
  "TokenValidation": {
    "Enabled": true,
    "Audiences": [
      "{{ClientId}}"
    ],
    "TenantId": "{{TenantId}}"
  },
  "AgentApplication": {
    "StartTypingTimer": false,
    "RemoveRecipientMention": false,
    "NormalizeMentions": false
  },
  "Connections": {
    "ServiceConnection": {
      "Settings": {
        "AuthType": "ClientSecret",
        "ClientId": "{{ClientId}}",
        "ClientSecret": "{{ClientSecret}}",
        "AuthorityEndpoint": "https://login.microsoftonline.com/{{TenantId}}",
        "Scopes": [
          "https://api.botframework.com/.default"
        ]
      }
    }
  },
  "ConnectionsMap": [
    {
      "ServiceUrl": "*",
      "Connection": "ServiceConnection"
    }
  ],
  "CopilotStudioClientSettings": {
    "DirectConnectUrl": "",
    "EnvironmentId": "",
    "SchemaName": "",
    "TenantId": "",
    "AppClientId": "",
    "AppClientSecret": ""
  }
}
```

## Core Workflow: ASP.NET Core agent host

```csharp
using Microsoft.Agents.Builder;
using Microsoft.Agents.Hosting.AspNetCore;
using Microsoft.Agents.Storage;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddHttpClient();
builder.AddAgentApplicationOptions();
builder.AddAgent<MyAgent>();
builder.Services.AddSingleton<IStorage, MemoryStorage>();

builder.Services.AddControllers();
builder.Services.AddAgentAspNetAuthentication(builder.Configuration);

WebApplication app = builder.Build();

app.UseAuthentication();
app.UseAuthorization();

app.MapGet("/", () => "Microsoft Agents SDK Sample");

var incomingRoute = app.MapPost("/api/messages",
    async (HttpRequest request, HttpResponse response, IAgentHttpAdapter adapter, IAgent agent, CancellationToken ct) =>
    {
        await adapter.ProcessAsync(request, response, agent, ct);
    });

if (!app.Environment.IsDevelopment())
{
    incomingRoute.RequireAuthorization();
}
else
{
    app.Urls.Add("http://localhost:3978");
}

app.Run();
```

## AgentApplication routing

```csharp
using Microsoft.Agents.Builder;
using Microsoft.Agents.Builder.App;
using Microsoft.Agents.Builder.State;
using Microsoft.Agents.Core.Models;
using System;

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