<PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />

AttributeCertificate

public DerBitString SignatureValue { get; }

public AttributeCertificate(AttributeCertificateInfo acinfo, AlgorithmIdentifier signatureAlgorithm, DerBitString signatureValue)

public static AttributeCertificate GetInstance(object obj)

public static AttributeCertificate GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)

public byte[] GetSignatureOctets()