please help me sir..

error :

Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0120: An object reference is required for the non-static field, method, or property 'pingtest.WebForm1.Label1' Source Error:

Line 22:             try
Line 23:             {
Line 24:                 Label1.Text=("Pinging" + address);
Line 25:                 Ping pingClass = new Ping();
Line 26:                 PingReply pingReply = pingClass.Send(address, timeout);

Source File: c:\Users\Administrator\Documents\Visual Studio 2012\Projects\pingtest\pingtest\WebForm1.aspx.cs    Line: 24

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.9214.0

<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.NetworkInformation;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace pingtest
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                long time = PingAddress("www.youtube.com", 1000);
            }
        }
        private static long PingAddress(string address, int timeout)
        {
            try
            {
                Label1.Text = ("Pinging" + address);
                Ping pingClass = new Ping();
                PingReply pingReply = pingClass.Send(address, timeout);
                return pingReply.RoundtripTime;
            }
            catch (Exception e)
            {

            }
            return -1;
        }
    }
}