Sent when the URL download must authenticate a challenge in order to download the request.
Original signature is '- (void)download:(NSURLDownload *)download didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge'
Available in Mac OS X v10.2 with Safari 1.0 installed and later.

C# | Visual Basic | Visual C++ |
public void DownloadDidReceiveAuthenticationChallengeMessage( NSURLDownload download, NSURLAuthenticationChallenge challenge )
Public Sub DownloadDidReceiveAuthenticationChallengeMessage ( _ download As NSURLDownload, _ challenge As NSURLAuthenticationChallenge _ )
public: void DownloadDidReceiveAuthenticationChallengeMessage( NSURLDownload^ download, NSURLAuthenticationChallenge^ challenge )

- download (NSURLDownload)
- The URL download object sending the message.
- challenge (NSURLAuthenticationChallenge)
- The URL authentication challenge that must be authenticated in order to download the request.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)