Create a Microsoft Graph client

The Microsoft Graph client is designed to make it simple to make calls to Microsoft Graph. You can use a single client instance for the lifetime of the application. For information about how to add and install the Microsoft Graph client package into your project, see Install the SDK.

The following code examples show how to create an instance of a Microsoft Graph client with an authentication provider in the supported languages. The authentication provider will handle acquiring access tokens for the application. Many different authentication providers are available for each language and platform. The different authentication providers support different client scenarios. For details about which provider and options are appropriate for your scenario, see Choose an Authentication Provider.

var scopes = new[] { "User.Read" };

// Multi-tenant apps can use "common",
// single-tenant apps must use the tenant ID from the Azure portal
var tenantId = "common";

// Value from app registration
var clientId = "YOUR_CLIENT_ID";

// using Azure.Identity;
var options = new TokenCredentialOptions
{
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud
};

// Callback function that receives the user prompt
// Prompt contains the generated device code that you must
// enter during the auth process in the browser
Func<DeviceCodeInfo, CancellationToken, Task> callback = (code, cancellation) => {
    Console.WriteLine(code.Message);
    return Task.FromResult(0);
};

// https://learn.microsoft.com/dotnet/api/azure.identity.devicecodecredential
var deviceCodeCredential = new DeviceCodeCredential(
    callback, tenantId, clientId, options);

var graphClient = new GraphServiceClient(deviceCodeCredential, scopes);