public SkipCertValidationHttpHandler(IConfiguration configuration) { this.configuration = configuration; var handler = new HttpClientHandler(); var skipValidationURLs = configuration["SkipCertificatesValidationForThisURLs"].Split(";"); base.ServerCertificateCustomValidationCallback = ((sender, cert, chain, errors) => HttpClientExtensions.ValidateCert(skipValidationURLs, sender, cert, chain, errors)); }