Cookie expiry date is always 1/1/0001 - asp.net-mvc

Question

Description:
I'm using cookie in mvc project to remember most recent download format selected by user. While creating cookie, I'm setting expiry date for that cookie. And when I try to get that cookie and expiry date of that cookie then I'm getting "1/1/0001" as expiry date always. I'm not getting the reason behind this. please help to reason behind this.
Code:
1) Setting cookie and it's expiry date:
Response.Cookies.Add(new HttpCookie(base.LoggedOnUser.Email, exportFileFormat.ToString()));
var requestCookie = Request.Cookies[base.LoggedOnUser.Email];
if (requestCookie != null)
{
requestCookie.Expires = DateTime.UtcNow.AddDays(Convert.ToInt32(ConfigurationManager.AppSettings["FileFormatTypeCookieExpiry"]));
}
2) Getting cookie and it's expiry date:
var fileFormatTypeCookie = HttpContext.Current.Request.Cookies[CurrentUser.Email];
if (fileFormatTypeCookie != null && fileFormatTypeCookie.Value != null)
{
var exportFileFormat = fileFormatTypeCookie.Value;
var expiry = fileFormatTypeCookie.Expires;
}
Above variable expiry is always "1/1/0001".

Answer 1

I quote the answer from MikeSmithDev from a possible duplicate question:
Why is the cookie expiration date not surviving across sessions in ASP.NET?
The Short Answer - You cannot read the cookie's expiration date and
time.
Slightly Longer Answer - This is not an issue of sessions in ASP.NET.
It is an issue of what you can read from a cookie server-side in
ASP.NET. Per the MSDN:
The browser is responsible for managing cookies, and the cookie's
expiration time and date help the browser manage its store of cookies.
Therefore, although you can read the name and value of a cookie, you
cannot read the cookie's expiration date and time. When the browser
sends cookie information to the server, the browser does not include
the expiration information. (The cookie's Expires property always
returns a date-time value of zero.)
You can read the Expires property of a cookie that you have set in the
HttpResponse object, before the cookie has been sent to the browser.
However, you cannot get the expiration back in the HttpRequest object.
So basically, the cookie expiration date is set correctly. This can be
verified by inspecting the cookie in the browser. Unfortunately,
reading this cookie like in your Get function will return 1/1/0001.
If you really want to get the expiration, then you'd have to store it
in the cookie itself:
Set
DateTime exp = DateTime.Now.AddDays(1);
HttpCookie PreferredCookie = new HttpCookie("PreferredCookie");
PreferredCookie.Values.Add("cookieType", "Zref");
PreferredCookie.Values.Add("exp", exp.ToString());
PreferredCookie.Expires = exp;
Response.Cookies.Set(PreferredCookie);
Get
HttpCookie PreferredCookie = Request.Cookies["PreferredCookie"];
if (PreferredCookie != null)
{
CookieLiteral.Text = "Value = " + PreferredCookie["cookieType"] + "<br>";
CookieLiteral.Text += "Expires = " + PreferredCookie["exp"];
}
else
{
CookieLiteral.Text = "No Cookie";
}