Web Part in Sharepoint 2010-AJAX based Timer Web Part

Step 1)   Create Silverlight Project using Visual Studio 2010,(see article)
Step 2) Add  new item->select Webpart  name its "TimerWp"
Step 3)   open TimerWp.cs

Replace with  following code
FileName:TimerWp.cs
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace SharePointProject1.TimerWp
{
    [ToolboxItemAttribute(false)]
    public class TimerWp : WebPart
    {

        Label lblTime = new Label();
        UpdatePanel updatePanel = new UpdatePanel();
        Timer t = new Timer();
        protected override void CreateChildControls()
        {
            lblTime.Text = "Time will be updated by Timer";
            t.Interval = 1000;//1000 milli seconds
            t.Tick += new EventHandler<EventArgs>(t_Tick);

            //Add controls to WebPart zone container.
            updatePanel.ContentTemplateContainer.Controls.Add(lblTime);
            updatePanel.ContentTemplateContainer.Controls.Add(t);
            this.Controls.Add(updatePanel);
        }

        void t_Tick(object sender, EventArgs e)
        {
            lblTime.Text = System.DateTime.Now.ToLongTimeString();
        }
    }
}
Step 3)  Deploy the Solution

Step 4) Add Ajax Timer Webpart to a Site.,

OUTPUT