AJAX Progress Bar for ASP.NET

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;
using System.Web.Services;
using System.Web.UI;
using System.Web.UI.WebControls;
using hmlib.Web.UI.Controls;

namespace WebTest.ProgressBarTest
{
	public partial class ProgressBar_OnCompleteTest : System.Web.UI.Page
	{
		protected void Page_Load(object sender, EventArgs e)
		{

		}
		[WebMethod]
		public static object getProgress(string progressId)
		{
			return Progress.GetResponse(progressId);
		}
		protected void btnStart_Click(object sender, EventArgs e)
		{
			TextBox1.Text = "";
			Progress progress = ProgressBar1.Progress;
			Thread thread = new Thread(() => Start(progress));
			thread.Start();
			btnStart.Enabled = false;
			//ProgressBar1.Completed = false;
		}
		private void Start(Progress progress)
		{
			double max = 100;
			progress.AddMessageLine("Started");
			for (int i = 0; i < max; i++)
			{
				progress.SetProgress(i / max);
				progress.AddMessageLine((i / max) * 100);
				Thread.Sleep(50);
			}
			progress.AddMessageLine("Finished");
			progress.SetProgress(1);
		}
		protected void ProgressBar1_Complete(object sender, EventArgs e)
		{
			btnStart.Enabled = true;
			Label1.Text = DateTime.Now.ToString();
		}
	}
}