使用图形.NET FieldValueSet更新人员字段的MS图形接口

using Microsoft.Graph;
using Microsoft.Identity.Client;
using System;
using System.Net.Http.Headers;
using System.Threading.Tasks;

public class GraphService
{
    private static async Task<string> GetAccessTokenAsync()
    {
        IConfidentialClientApplication app = ConfidentialClientApplicationBuilder.Create("client-id")
            .WithClientSecret("client-secret")
            .WithAuthority(new Uri("https://login.microsoftonline.com/tenant-id"))
            .Build();

        string[] scopes = new string[] { "https://graph.microsoft.com/.default" };
        var result = await app.AcquireTokenForClient(scopes).ExecuteAsync();
        return result.AccessToken;
    }

    public static async Task UpdateUserAsync(string userId)
    {
        var accessToken = await GetAccessTokenAsync();
        var graphClient = new GraphServiceClient(new DelegateAuthenticationProvider((requestMessage) =>
        {
            requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
            return Task.CompletedTask;
        }));

        var fieldValueSet = new FieldValueSet
        {
            AdditionalData = new Dictionary<string, object>
            {
                { "givenName", "John" },
                { "surname", "Doe" },
                { "mail", "john.doe@example.com" },
                { "department", "Engineering" }
            }
        };

        await graphClient.Users[userId].Request().UpdateAsync(fieldValueSet);
    }
}