Cookies lifetime and turning off PC

Question

When a PC is turned off, are all of the cookies destroyed or kept? In particular, this is with an ASP.NET/Sharepoint app.

Thanks

Answer 1

Cookies can persist past the uptime of the PC. They're stored on disk according to the expiration time set by the website and optionally overridden by the browser.

Answer 2

Generally speaking no. Cookies are kept until they expire (you can set the expiration date for an ASP.NET cookie by using the HttpCookie.Expires property).

But a user might have there browser setup to delete any cookies when they close the browser. So you can't really rely on cookies being deleted or not from a client's machine.