<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
                <ContentTemplate>
                    <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
                    <asp:Timer ID="Timer2" runat="server" Interval="10000" ontick="Timer2_Tick">
                    </asp:Timer>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
                    <asp:AsyncPostBackTrigger ControlID="Timer2" EventName="Tick" />
                </Triggers>
            </asp:UpdatePanel>
            <asp:Timer ID="Timer1" runat="server" Interval="10000" ontick="Timer1_Tick">
            </asp:Timer>
        </div>
    </form>
</body>
</html>
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = System.DateTime.Now.ToString();
      
    }
    protected void Timer2_Tick(object sender, EventArgs e)
    {
        Label1.Text = System.DateTime.Now.ToString();
    }
    protected void Timer1_Tick(object sender, EventArgs e)
    {
        Label1.Text = System.DateTime.Now.ToString();
    }
}
                    
                
                
            
        
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