使用C#从SharePoint Online网站下载用户的个人资料图像

using Microsoft.SharePoint.Client;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        string siteUrl = "https://your-sharepoint-site-url";
        string userName = "your-username";
        string password = "your-password";
        string userId = "user-id";

        using (ClientContext context = new ClientContext(siteUrl))
        {
            // 设置凭据
            context.Credentials = new SharePointOnlineCredentials(userName, password);

            // 获取用户的个人资料图像
            PeopleManager peopleManager = new PeopleManager(context);
            PersonProperties personProperties = peopleManager.GetPropertiesFor(userId);
            context.Load(personProperties, p => p.PictureUrl);
            context.ExecuteQuery();

            // 下载图像文件
            using (WebClient client = new WebClient())
            {
                client.DownloadFile(personProperties.PictureUrl, "profile-picture.jpg");
            }
        }
    }
}