How does 304 Not Modified work exactly? - Stack Overflow How are "304 Not Modified" responses generated? How does a browser determine whether the response to an HTTP request is 304? Is it set by the browser or sent from the server? If sent by the server,
Why am I getting (304) Not Modified error on some links when using . . . 59 Any ideas why on some links that I try to access using HttpWebRequest I am getting "The remote server returned an error: (304) Not Modified " in the code? The code I'm using is from Jeff's post here (the page seems to have disappeared, see an archive copy at the Wayback Machine)