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HttpCookie

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs"  Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">     <title>Untitled Page</title> </head> <body>     <form id="form1" runat="server">     <div>       <asp:Label ID="myLabel" runat="server" />     </div>     </form> </body> </html> File: Default.aspx.cs 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)     {         HttpCookie userCookie;         userCookie = Request.Cookies["UserID"];         if (userCookie == null)         {             myLabel.Text = "Creating a cookie now.";             userCookie = new HttpCookie("UserID", "JoeBlack");             userCookie.Expires = DateTime.Now.AddMonths(1);             Response.Cookies.Add(userCookie);         }         else         {             myLabel.Text = "Welcome back, " + userCookie.Value;         }     } }