Allowing Untrusted SSL Certificates with HttpClient

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A quick and dirty solution is to use the ServicePointManager.ServerCertificateValidationCallback delegate. This allows you to provide your own certificate validation. The validation is applied globally across the whole App Domain.

ServicePointManager.ServerCertificateValidationCallback +=
    (sender, cert, chain, sslPolicyErrors) => true;

I use this mainly for unit testing in situations where I want to run against an endpoint that I am hosting in process and am trying to hit it with a WCF client or the HttpClient.

For production code you may want more fine grained control and would be better off using the WebRequestHandler and its ServerCertificateValidationCallback delegate property (See dtb’s answer below). Or ctacke answer using the HttpClientHandler. I am preferring either of these two now even with my integration tests over how I used to do it unless I cannot find any other hook.

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