<PackageReference Include="System.ServiceModel.Primitives" Version="8.1.2" />

System.ServiceModel.Security.X509CertificateInitiatorClientCredential

namespace System.ServiceModel.Security { public sealed class X509CertificateInitiatorClientCredential { public X509Certificate2 Certificate { get; set; } public void SetCertificate(StoreLocation storeLocation, StoreName storeName, X509FindType findType, object findValue); public void SetCertificate(string subjectName, StoreLocation storeLocation, StoreName storeName); } }