HTTP 404 interpreted as "An exception occurred during a WebClient request"

[luiscantero]

When using GZipWebClient to access a URI that leads to a 404, this: wc.OpenReadCompleted += (s, e) =>

... results in s.Error: "An exception occurred during a WebClient request. "

In contrast, when using WebClient, s.Error contains this: "The remote server returned an error: NotFound."