HttpCookieCollection.Get(): Possible NullReferenceException

Question

I see the ReSharper warning 'Possible NullReferenceException' on this code on second line:

var cookie = HttpContext.Current.Response.Cookies[CookieName];
cookie.Expires = DateTime.Now.AddDays(-1);

I checked HttpCookieCollection.Get() Method in MSDN and it says 'If the named cookie does not exist, this method creates a new cookie with that name.'. So it looks like NullReferenceException can't happen.

Is it just ReSharper bug or I missed something?

Answer 1

So it looks like NullReferenceException can't happen.

HttpContext.Current will be null if you execute this code outside of an ASP.NET context, like for example unit test, console or desktop application.