Cookies Expires is not working as per expectation

Question

I keep getting an error while using this line of code, I'm trying to let the cookie "myCookie" to expire when it's 12:00 am.

But I'm not sure why I'm unable to do this.

These are the errors:

If I use this,

Response.Cookies["myCookie"].Expires = DateTime.UtcNow.AddDays(1);

I got this:

Cannot apply indexing with [] to an expression of type 'IResponseCookies'

If I use this,

Response.Cookies("myCookie").Expires = DateTime.UtcNow.AddDays(1);

I got this:

Non-invocable member 'HttpResponse.Cookies' cannot be used like a method.

How to solve this?

user_2946329 · Answer

You need to use Cookie Options:

var cookieOptions = new CookieOptions
{
    Expires = DateTime.UtcNow.AddDays(1)
};
Response.Cookies.Append("myCookie", "value1", cookieOptions);

Cookie options provide access to additional configuration of cookies.