Problems setting a cookie that already exists

Hello,

I have discovered that if I try and add a cookie when one by that already exists, nothing happens. No error, but the cookie is not set to the new value.

For example (this is running in a DLL, which is why I use HttpContext)...

HttpCookie cookie = new HttpCookie("fred", "ferret");
DateTime expiryDate = DateTime.Now.AddMonths(1);
cookie.Expires = expiryDate;
HttpContext.Current.Response.Cookies.Add(cookie);

works fine if the cookie "fred" does not already exist, but if it does, then it is not updated to have the new value.

How do I handle this? I tried...

HttpContext.Current.Response.Cookies["fred"] = cookie;

but that didn't do anything either. Either way, the old value remains in the cookie.

Any advice appreciated.

--
Alan Silver
(anything added below this line is nothing to do with me)
.

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