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

System.Security.Cryptography.X509Certificates.X509KeyUsageFlags

public enum X509KeyUsageFlags
namespace System.Security.Cryptography.X509Certificates { public enum X509KeyUsageFlags { CrlSign = 2, DataEncipherment = 16, DecipherOnly = 32768, DigitalSignature = 128, EncipherOnly = 1, KeyAgreement = 8, KeyCertSign = 4, KeyEncipherment = 32, None = 0, NonRepudiation = 64 } }