Response.Cookies["userName"].Value = "patrick";

Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);

HttpCookie aCookie = new HttpCookie("lastVisit");

aCookie.Value = DateTime.Now.ToString();

aCookie.Expires = DateTime.Now.AddDays(1);

Response.Cookies.Add(aCookie);

if(Request.Cookies["userName"] != null)

    Label1.Text = Server.HtmlEncode(Request.Cookies["userName"].Value);

if(Request.Cookies["userName"] != null)

{

    HttpCookie aCookie = Request.Cookies["userName"];

    Label1.Text = Server.HtmlEncode(aCookie.Value);

}

int counter;

if (Request.Cookies["counter"] == null)

    counter = 0;

else

{

    counter = int.Parse(Request.Cookies["counter"].Value);

}

counter++;

Response.Cookies["counter"].Value = counter.ToString();

Response.Cookies["counter"].Expires = DateTime.Now.AddDays(1);

string subkeyName;

subkeyName = "userName";

HttpCookie aCookie = Request.Cookies["userInfo"];

aCookie.Values.Remove(subkeyName);

aCookie.Expires = DateTime.Now.AddDays(1);

Response.Cookies.Add(aCookie);

HttpCookie aCookie;

string cookieName;

int limit = Request.Cookies.Count;

for (int i=0; i<limit; i++)

{

    cookieName = Request.Cookies[i].Name;

    aCookie = new HttpCookie(cookieName);

    aCookie.Expires = DateTime.Now.AddDays(-1);

    Response.Cookies.Add(aCookie);

}