How to set cookie value in C#?

[HttpGet]
public ActionResult Details()
{
  HttpCookie cookie = new HttpCookie("MySiteCookie", "For the love of Pete, do not put unencrypted info in cookies!");
  Response.SetCookie(cookie);
  return View();
}

[HttpPost]
public ActionResult Details(int i)
{
  HttpCookie cookie = Request.Cookies["MySiteCookie"];
  // do something with the cookie
  return View(new Model.SomeData(i));
}