将图片上传到Blob容器的字节数为零

Question

我正在尝试从asp.net核心将图像上传到blob容器，但是我看到在blob容器中上传图像后该图像为零字节。我在Google中搜索以解决问题并设置position = 0（即使仍然存在问题），有人找到我错了的地方吗？

这是我正在使用的代码。

   public async Task AddFace(IFormFile file)
    {
        dynamic FileExtension = string.Empty;
        if (file.Length > 0)
        {
            FileExtension = Path.GetExtension(file.FileName);
            if (string.IsNullOrEmpty(FileExtension))
            {
                FileExtension = ".jpg";
            }
            using (Stream stream = file.OpenReadStream())
            {
                stream.Seek(0, SeekOrigin.Begin);                   

                //UPLOAD TO BLOB CONTAINER
        CloudStorageAccount account = CloudStorageAccount.Parse(ConnectionString);
        CloudBlobClient blobClient = account.CreateCloudBlobClient();
        CloudBlobContainer blobContainer = blobClient.GetContainerReference(configuration[ConfigKeys.BlobStorageConfiguration.BlobContainer]);
        CloudBlockBlob blockBlob = blobContainer.GetBlockBlobReference(file.FileName+FileExtension );

        await blockBlob.UploadFromStreamAsync(stream);


            }
        }
    }