Загрузка файлов на сервер, как определить состояние загрузки

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    var ftpWebRequest = (FtpWebRequest)WebRequest.Create("ftp://xxx.com");
    ftpWebRequest.Method = WebRequestMethods.Ftp.UploadFile;
    using (var inputStream = File.OpenRead(fileName))
    using (var outputStream = ftpWebRequest.GetRequestStream())
    {
        var buffer = new byte[1024 * 1024];
        int totalReadBytesCount = 0;
        int readBytesCount;
        while ((readBytesCount = inputStream.Read(buffer, 0, buffer.Length)) > 0)
        {
            outputStream.Write(buffer, 0, readBytesCount);
            totalReadBytesCount += readBytesCount;
            var progress = totalReadBytesCount * 100.0 / inputStream.Length;
            backgroundWorker1.ReportProgress((int)progress);
        }
    }
}
 
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar.Value = e.ProgressPercentage;
}

var InputStream = Test_upload.GetMultipartFormData_Stream(postParameters, formDataBoundary);
                //-------------------------------------------
 
 
                var request = (HttpWebRequest)WebRequest.Create("xxxxx.xxx.com");
        
                request.Method = "POST";
                request.ContentType = contentType;
                request.CookieContainer = new CookieContainer();
                request.ContentLength = InputStream.Length;
 
 
                //using (var inputStream = File.OpenRead(fileName))
                using (var outputStream = request.GetRequestStream())
                {
                    var buffer = new byte[InputStream.Length];
                    int totalReadBytesCount = 0;
                    int readBytesCount;
 
                    while ((readBytesCount = InputStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        outputStream.Write(buffer, 0, readBytesCount);
                        totalReadBytesCount += readBytesCount;
                
                        var progress = totalReadBytesCount * 100.0 / InputStream.Length;
                        back_worker.ReportProgress((int)progress);
                    }
                }