How to get Progress Status while uploading/ downloading a file ( in .Net ) ?

Hello,

I have tried with downloading and uploading functions supplied by you, it gives the progress data alright, but I can not set that data to progress bar. I have worked with couple of hours but can not place that process status in the progress bar or any other way. I have attached codes of Upload 

private async Task ChunkUpload()
{

string path = UploadFolder + "/" + UploadFile;
 FileStream stream = UploadFileStream;
 int chunkSize = 128 * 1024;
 
 DropboxClient dbx = new DropboxClient(SystemVariables.WebAcccessToken);
 int numChunks = (int)Math.Ceiling((double)stream.Length / chunkSize);
 byte[] buffer = new byte[chunkSize];
 string sessionId = null;


 
 for (var idx = 0; idx < numChunks; idx++)
 {
 

 var byteRead = stream.Read(buffer, 0, chunkSize);

 using (var memSream = new MemoryStream(buffer, 0, byteRead))
 {
 if (idx == 0)
 {
 var result = await dbx.Files.UploadSessionStartAsync(false, memSream);
 sessionId = result.SessionId;
 }
 else
 {
 var cursor = new UploadSessionCursor(sessionId, (ulong)(chunkSize * idx));
 var percentage = 100 * ((chunkSize * idx) / (double)stream.Length);
 pValue = (int)Math.Ceiling((decimal)percentage);



 // Approach 1

 var progressIndicator = new Progress<int>(ReportProgress);
 int uploads = await UploadProgress(progressIndicator);

// Approach 2

 /*
 Thread t = new Thread(new ThreadStart(this.DoProcess));

 t.Start();

 while (t.IsAlive) // while thread is running
 {

 Application.DoEvents(); // Allow UI to refresh if needed

 Thread.Sleep(10000); // sleep a while to avoid processor load
 t.Abort();
 }*/

 
 if (idx == numChunks - 1)
 {
 await dbx.Files.UploadSessionFinishAsync(cursor, new CommitInfo(path), memSream);
 }
 else
 {
 await dbx.Files.UploadSessionAppendV2Async(cursor,false, memSream);
 
 }
 }
 }
 }
 }





 public delegate void UpdateProgressBarDelegate(int progress);
 public UpdateProgressBarDelegate UpdateProgressBar;

 private void UpdateProgressBarMethod(int progress)
 {
 IAsyncResult result = this.progressBar1.BeginInvoke(
 (MethodInvoker)delegate()
 {
 progressBar1.Value = progress;
 Text = progress.ToString();
 //txtLogDetails.Text = message; 

 });
}

private void DoProcess()
 {
 UpdateProgressBarMethod(pValue);
 }






void ReportProgress(int value)
 {
 progressBar1.Value = value;
 }

 async Task<int> UploadProgress(IProgress<int> progress)
 {
 int processCount = await Task.Run<int>(() =>
 {
 if (progress != null)
 {
 progress.Report(pValue);
 }

 return pValue;
 });
 return processCount;
 }



You can see the 2 approaches that I have tried to update progress bar value,
but can not see the update in progress bar.

It will be great if you provide the detail code for display updates in progress bar from the scratch.