如何以编程方式访问 Exchange 邮箱

Question

我尝试阅读 Office 365 邮箱以便以编程方式下载附件。 但我只收到此错误... The request failed. The remote server returned an error: (401) Unauthorized The request failed. The remote server returned an error: (401) Unauthorized

我用这个代码...

static void GetInboxMail(string emailAddress, string pass)
{
    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
    service.Credentials = new NetworkCredential(emailAddress, pass);

    service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");

    if (service != null)
    {
        FindItemsResults<Item> result = service.FindItems(WellKnownFolderName.Inbox, new ItemView(100));

        foreach (Item item in result)
        {
            EmailMessage message = EmailMessage.Bind(service, item.Id);
            string body = message.Body.Text;
            string from = message.From.Name.ToString();
            string subject = message.Subject.ToString();
            Console.WriteLine("Email Sender :" + from);
            Console.WriteLine("Email Body" + body);
            Console.WriteLine("Email Subject" + subject);
        }
    }
}

我在这里想念什么？