<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Security.Cryptography.X509Certificates.X509ChainStatus

public struct X509ChainStatus
namespace System.Security.Cryptography.X509Certificates { public struct X509ChainStatus { public X509ChainStatusFlags Status { get; set; } public string StatusInformation { get; set; } } }