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

Org.BouncyCastle.Bcpg.Sig.IssuerKeyId

namespace Org.BouncyCastle.Bcpg.Sig { public class IssuerKeyId : SignatureSubpacket { public long KeyId { get; } protected static byte[] KeyIdToBytes(long keyId); public IssuerKeyId(bool critical, bool isLongLength, byte[] data); public IssuerKeyId(bool critical, long keyId); } }