我已經為這個問題苦苦掙扎了幾個小時，我希望你能幫助我。不知何故，我的編譯器只接受 InitiateMultipartUploadAsync 而不是常規的 InitiateMultipartUpload 并且絕對需要回調作為參數來編譯，但我可以弄清楚給他什么回調函數。private static async Task UploadObjectAsync(){    // Create list to store upload part responses.    List<UploadPartResponse> uploadResponses = new List<UploadPartResponse>();    // Setup information required to initiate the multipart upload.    InitiateMultipartUploadRequest initiateRequest = new InitiateMultipartUploadRequest    {        BucketName = "XXXXXXXXX",        Key = "videos/multipart"    };    // Initiate the upload.    InitiateMultipartUploadResponse initResponse =        await S3Client.InitiateMultipartUploadAsync(initiateRequest);    // Upload parts.    long contentLength = new FileInfo("videotest").Length;    long partSize = 5 * (long)Math.Pow(2, 20); // 5 MB    try    {        Console.WriteLine("Uploading parts");        long filePosition = 0;        for (int i = 1; filePosition < contentLength; i++)        {            UploadPartRequest uploadRequest = new UploadPartRequest            {                BucketName = "XXXXXXXX",                Key = "videos/multipart",                UploadId = initResponse.UploadId,                PartNumber = i,                PartSize = partSize,                FilePosition = filePosition,                FilePath = "videotest"            };            // Track upload progress.            uploadRequest.StreamTransferProgress +=                new EventHandler<StreamTransferProgressArgs>(UploadPartProgressEventCallback);            // Upload a part and add the response to our list.            uploadResponses.Add(await S3Client.UploadPartAsync(uploadRequest));            filePosition += partSize;        }此代碼的靈感來自官方 aws 示例：https ://docs.aws.amazon.com/AmazonS3/latest/dev/LLuploadFileDotNet.html 所以我真的不明白為什么這不起作用！目前使用上面的代碼，Visual Studio 告訴我 InitiateMultipartUploadAsync、UploadPartAsync、CompleteMultipartUploadAsync 和 AbortMultipartUploadAsync 都需要回調函數，但是 1) 示例說回調是可選的 2) 我嘗試的每個回調都不起作用。提前致謝