Question

How is the following code evaluated?

ServicePointManager.ServerCertificateValidationCallback += ValidateRemoteCertificateA;
ServicePointManager.ServerCertificateValidationCallback += ValidateRemoteCertificateB;

Given an HttpWebRequest, is it enough if one of the Validator methods returns true, or do they both have to return true? i.e.

ValidateRemoteCertificateA && ValidateRemoteCertificateB

or

ValidateRemoteCertificateA || ValidateRemoteCertificateB

?

Cheers,
tamberg

Answer 1

It will use the return value of the last delegate added, in all cases.

ServerCertificateValidationCallback is a multicast delegate property.
Writing ServerCertificateValidationCallback += x appends x to its invocation list.
The return value of a multicast delegate is the return value of the last delegate in its list.