Error while passing file stream to wcf rest service for amazon s3 coud upload

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WCF

Amazon-S3

REST

Hello,

I am uploading file to Amazon cloud storage using WCF Rest service. The service receives Stream as a input and this stream is being passed to CloudUpload API. Below is my code.

public void UploadFileWithStream(Stream FileStream)
        {
           
            try
            {
                
                TransferUtility fileTransferUtility = new
                      TransferUtility(new AmazonS3Client("access key", "secret access key", Amazon.RegionEndpoint.USEast1));

                TransferUtilityUploadRequest fileTransferUtilityRequest = new TransferUtilityUploadRequest
                {
                    BucketName = "bucketNM",
                    InputStream = FileStream,
                    StorageClass = S3StorageClass.Standard,
                    PartSize = 6291456,
                    Key = @"Trial/filenm.jpg",
                    CannedACL = S3CannedACL.BucketOwnerFullControl
                };

                fileTransferUtility.Upload(fileTransferUtilityRequest);

            }
            catch (Exception ex)
            {
               
            }

        }

I am getting the following error in this method.

Specified method is not supported. at System.ServiceModel.Dispatcher.StreamFormatter.MessageBodyStream.get_Length()
at Amazon.S3.Transfer.TransferUtilityUploadRequest.get_ContentLength()
at Amazon.S3.Transfer.TransferUtility.IsMultipartUpload(TransferUtilityUploadRequest request)
at Amazon.S3.Transfer.TransferUtility.GetUploadCommand(TransferUtilityUploadRequest request)
at Amazon.S3.Transfer.TransferUtility.UploadHelper(TransferUtilityUploadRequest request)
at Amazon.S3.Transfer.TransferUtility.Upload(TransferUtilityUploadRequest request)
at WCFRestService.StreamAsInput.UploadFileWithStream(Stream FileStream) in D:\Research\Research\RestService\StreamAsInput.svc.cs:line 42

Any help will be greatly appreciated