如何使用Microsoft Graph API rest调用上传超过4MB的c#

using System;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

public class GraphApiClient
{
    private readonly HttpClient _httpClient;
    private readonly string _accessToken;

    public GraphApiClient(string accessToken)
    {
        _accessToken = accessToken;
        _httpClient = new HttpClient();
        _httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", _accessToken);
    }

    public async Task UploadLargeFile(string filePath, string uploadUrl)
    {
        const int chunkSize = 5 * 1024 * 1024; // 5MB

        using (var fileStream = new FileStream(filePath, FileMode.Open))
        {
            var fileSize = fileStream.Length;
            var totalChunks = (int)Math.Ceiling((double)fileSize / chunkSize);

            for (int i = 0; i < totalChunks; i++)
            {
                var chunkBuffer = new byte[chunkSize];
                var bytesRead = fileStream.Read(chunkBuffer, 0, chunkSize);

                var content = new ByteArrayContent(chunkBuffer);
                content.Headers.Add("Content-Range", $"bytes {i * chunkSize}-{i * chunkSize + bytesRead - 1}/{fileSize}");

                var response = await _httpClient.PutAsync(uploadUrl, content);
                response.EnsureSuccessStatusCode();
            }
        }

        var completionResponse = await _httpClient.PatchAsync(uploadUrl, null);
        completionResponse.EnsureSuccessStatusCode();
    }
}

public class Program
{
    public static async Task Main()
    {
        // 获取访问令牌的代码省略

        var accessToken = "YOUR_ACCESS_TOKEN";
        var graphApiClient = new GraphApiClient(accessToken);

        var filePath = "PATH_TO_LARGE_FILE";
        var uploadUrl = "UPLOAD_SESSION_URL";

        await graphApiClient.UploadLargeFile(filePath, uploadUrl);

        Console.WriteLine("File uploaded successfully.");
    }
}