问如何使用MicrosoftGraph任意一封电子邮件发送电子邮件

EN

using Azure.Identity;
using Microsoft.Graph;
var mesg = new Message
{
    Subject = "Meet for lunch?",
    Body = new ItemBody
    {
        ContentType = BodyType.Text,
        Content = "The new cafeteria is open."
    },
    ToRecipients = new List<Recipient>
    {
        new Recipient
        {
            EmailAddress = new EmailAddress
            {
                //who will receive the email
                Address = "xxx@gmail.com"
            }
        }
    },
    Attachments = new MessageAttachmentsCollectionPage()
};

var scopes = new[] { "https://graph.microsoft.com/.default" };
var tenantId = "your_tenant_name.onmicrosoft.com";
var clientId = "azure_ad_app_client_id";
var clientSecret = "client_secret_for_the_azuread_app";
var clientSecretCredential = new ClientSecretCredential(
    tenantId, clientId, clientSecret);
var graphClient = new GraphServiceClient(clientSecretCredential, scopes);
await graphClient.Users["user_id_which_you_wanna_used_for_sending_email"].SendMail(mesg, false).Request().PostAsync();

var message = new Message
{
    Subject = "Subject",
    Body = new ItemBody
    {
        ContentType = BodyType.Text,
        Content = "Content"
    },
    ToRecipients = new List<Recipient>()
    {
        new Recipient
        {
            EmailAddress = new EmailAddress
            {
                Address = "john.doe@contoso.onmicrosoft.com"
            }
        }
    }
};

var saveToSentItems = false;

await graphClient.Users["userId"]
    .SendMail(message,saveToSentItems)
    .Request()
    .PostAsync();