Returns the receiver’s sender.
Original signature is '- (id < NSURLAuthenticationChallengeSender >)sender'
Available in Mac OS X v10.2 with Safari 1.0 installed and later.

C# | Visual Basic | Visual C++ |
public virtual INSURLAuthenticationChallengeSender Sender { get; }
Public Overridable ReadOnly Property Sender As INSURLAuthenticationChallengeSender Get
public: virtual property INSURLAuthenticationChallengeSender^ Sender { INSURLAuthenticationChallengeSender^ get (); }

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