read Cookie

 Greetings to you ..
 how can i read value from cookies ?
this is my code .. i want to read , ID , USER NAME , PASSWORD .. 
 
 
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 admin_login_admin : System.Web.UI.UserControl
{
...