<PackageReference Include="System.ServiceModel.Primitives" Version="8.1.1" />

System.ServiceModel.Security.X509ServiceCertificateAuthentication

namespace System.ServiceModel.Security { public sealed class X509ServiceCertificateAuthentication { public X509CertificateValidationMode CertificateValidationMode { get; set; } public X509RevocationMode RevocationMode { get; set; } public StoreLocation TrustedStoreLocation { get; set; } public X509CertificateValidator CustomCertificateValidator { get; set; } public X509ServiceCertificateAuthentication(); } }