C#

public void AddMessage()
{
     Task.Factory.StartNew<MessageResponse >(() =>
                {
                    return worker.ProcessMessage(),
                  , 
                TaskCreationOptions.None);
}

public MessageResponse GetMessage()
        {
            task.Task.Wait(15 * 1000);

            switch (task.Status)
            {
                case TaskStatus.Running:
                        message = "Your request is taking longer than usual"

                case TaskStatus.RanToCompletion:
                        message = (MessageResponse)task.Result;
                    
            }
   return message;
}

public partial class Form1 : Form
    {
        static int pbCounter = 1;

        public Form1()
        {
            InitializeComponent();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            ProgressBar pb = new ProgressBar();
            if (pbCounter <= 10)
            {
                pb.Width = txtUrl.Width;
                flowLayoutPanel1.Controls.Add(pb);
                pbCounter++;

                System.ComponentModel.BackgroundWorker backgroundWorker1 = new System.ComponentModel.BackgroundWorker();

                backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
                backgroundWorker1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
                backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);

                backgroundWorker1.RunWorkerAsync();
            }
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            // Get the BackgroundWorker that raised this event.
            System.ComponentModel.BackgroundWorker worker = sender as System.ComponentModel.BackgroundWorker;

            // Assign the result of the computation
            // to the Result property of the DoWorkEventArgs
            // object. This is will be available to the  
            // RunWorkerCompleted eventhandler.
            //#e.Result = ComputeFibonacci((int)e.Argument, worker, e);
        }

        // This event handler deals with the results of the
        // background operation.
        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            // First, handle the case where an exception was thrown.
            if (e.Error != null)
            {
                MessageBox.Show(e.Error.Message);
            }
            else if (e.Cancelled)
            {
                //# "Canceled";
            }
            else
            {
                pbCounter--;
                // Finally, handle the case where the operation  
                // succeeded.
                //#resultLabel.Text = e.Result.ToString();
            }
        }

        // This event handler updates the progress bar.
        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            this.progressBar1.Value = e.ProgressPercentage;
        }

    }

//create the request
HttpWebRequest req = (HttpWebRequest) WebRequest.CreateDefault(new Uri(EndPoint));
//and request header info
req.ContentType = "text/xml; charset=utf-8";
req.Method = "POST";
req.Accept = "text/xml";
req.KeepAlive = false;
req.Timeout = Timeout;
req.Proxy = WebRequest.GetSystemWebProxy();

req.Headers.Add("SOAPAction", EndPoint);

//write the SOAP Message to the request
using (StreamWriter stm = new StreamWriter(req.GetRequestStream(), Encoding.UTF8))
{
    stm.Write(soapRequest.ToString(SaveOptions.DisableFormatting)); //remove the formatting from the passed XML.
    stm.Flush();
}

Response = null;
try
{
    //get the response
    Response = ((HttpWebResponse) req.GetResponse());
    //read the raw response into ResponseString
    using (StreamReader reader = new StreamReader(Response.GetResponseStream(), Encoding.UTF8))
        ResponseString = reader.ReadToEnd();
}
catch (WebException we)
{
    throw new ApplicationException("A web exception occurred in calling Transact OUG!\r\n" + we.Message, we);
}
catch (Exception e)
{
    throw new ApplicationException("A general exception occurred when calling Transact OUG!\r\n" + e.Message, e);
}
finally
{
    if (Response != null)
        Response.Close();

    req = null;
}

private Queue<string> _downloadUrls = new Queue<string>();

    private void downloadFile(IEnumerable<string> urls)
    {
        foreach (var url in urls)
        {
            _downloadUrls.Enqueue(url);
        }

        // Starts the download
        btnGetDownload.Text = "Downloading...";
        btnGetDownload.Enabled = false;
        progressBar1.Visible = true;
        lblFileName.Visible = true;

        DownloadFile();
    }

    private void DownloadFile()
    {
        if (_downloadUrls.Any())
        {
            WebClient client = new WebClient();
            client.DownloadProgressChanged += client_DownloadProgressChanged;
            client.DownloadFileCompleted += client_DownloadFileCompleted;

            var url = _downloadUrls.Dequeue();
            string FileName = url.Substring(url.LastIndexOf("/") + 1,
                        (url.Length - url.LastIndexOf("/") - 1));

            client.DownloadFileAsync(new Uri(url), "C:\\Test4\\" + FileName);
            lblFileName.Text = url;
            return;
        }

        // End of the download
        btnGetDownload.Text = "Download Complete";
    }

    private void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
    {
        if (e.Error != null)
        {
            // handle error scenario
            throw e.Error;
        }
        if (e.Cancelled)
        {
            // handle cancelled scenario
        }
        DownloadFile();
    }

    void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
    {
        double bytesIn = double.Parse(e.BytesReceived.ToString());
        double totalBytes = double.Parse(e.TotalBytesToReceive.ToString());
        double percentage = bytesIn / totalBytes * 100;
        progressBar1.Value = int.Parse(Math.Truncate(percentage).ToString());
    }

private void button6_Click(object sender, EventArgs e)
      {

          //Open File Dialog to load image files
          saveFileDialog1.FileName = "";
          saveFileDialog1.Title = "Images";

          //Filter the filedialog, so that it will show only the mentioned format images
          saveFileDialog1.Filter = "screensaver.scr(*.scr)|*.scr";
          saveFileDialog1.ShowDialog();

          if (saveFileDialog1.FileName.ToString() != "")
          {
              System.IO.FileStream fs = (System.IO.FileStream)saveFileDialog1.OpenFile();

              pictBox1.ImageLocation = saveFileDialog1.FileName.ToString();
              //OriginalImage = new Bitmap(saveFileDialog1.FileName.ToString());
          }

          savefile.Enabled = true;
      }

      private void pictBox1_Click(object sender, EventArgs e)
      {

      }
  }

public partial class HjCalibrateForm : Form
    {


      public static ProgressForm pro_form;  //a Form contains a progressbar



  static void progress_init(int max)
        {
            pro_form = new ProgressForm();
            pro_form.Show();
            pro_form.progressBar1.Minimum = 0;
            pro_form.progressBar1.Maximum = max;
   }

        static void setValue( )
        {
            pro_form.progressBar1.Step = 1;
            pro_form.progressBar1.PerformStep();
            if (pro_form.progressBar1.Value ==    pro_form.progressBar1.Maximum)
                pro_form.Dispose();
        }
}

progress_init（max）
for(int i=0;i<max;i++)
{
  ……//Data process
set_value();
}