Response.Cookies.Add(hc);

i call this cookie in xaml page(silverlight 2.0)

using System.Windows.Browser;

  string  str = string.Empty;

str = HtmlPage.Document.Cookies;

Empid = str.Split('=')[1];

private static string _empid = string.Empty;

public static string Empid

get { return UserDetails._empid; }

set { UserDetails._empid = value; }

. here my problem  is  i  have logout button in xaml page.. when  i click it i redirected to login page..., again  i login with another username and password..,  in  string str, it showing old values and new values... how to delete cookies when i log out..

thank u