amazon Unable to write data to the transport connection?

Question

I am developing a software in WPF to upload files on amazon cloud. I am able to successfully upload file using httpweb reuqest object. My problem is that when i pause the upload (i have created a pause button) it should be stop uploading at that time, but when i resume the upload, it display the following exception and the upload get suspended.

Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host.

 

My code is as follows:-

Amazon.S3.AmazonS3 s3Client = new Amazon.S3.AmazonS3Client(AccessKey, SecretKey);

Amazon.S3.Model.GetPreSignedUrlRequest request = new Amazon.S3.Model.GetPreSignedUrlRequest();

request.WithBucketName("sample");

request.WithKey("filename");

request.Verb = Amazon.S3.Model.HttpVerb.PUT;

string url = null;

url = s3Client.GetPreSignedURL(request);

HttpWebRequest httpRequest = WebRequest.Create(url) as HttpWebRequest;

httpRequest.Method = "PUT";

httpRequest.Timeout = -1;

httpRequest.ReadWriteTimeout = -1;

httpRequest.KeepAlive = true;

httpRequest.ProtocolVersion = HttpVersion.Version11;

httpRequest.ServicePoint.ConnectionLimit = 10;

httpRequest.AllowWriteStreamBuffering = false;

httpRequest.ContentLength = FileSize;

Stream writeStream = httpRequest.GetRequestStream();

while (true)

{

    currentPackageSize = stream.Read(buffer, 0, buffer.Length);

    if (currentPackageSize > 0)

    {

        writeStream.Write(buffer, 0, currentPackageSize);

    }

    else

        break;

}

stream.Flush();

stream.Close();

I need the solution as soon as possible. Thanks in Advance.