<PackageReference Include="BouncyCastle.Cryptography" Version="2.8.0-beta.349" />

Org.BouncyCastle.Bcpg.Sig.KeyExpirationTime

Signature Subpacket containing the number of seconds after the key's creation date, after which the key expires.
namespace Org.BouncyCastle.Bcpg.Sig { public class KeyExpirationTime : SignatureSubpacket { public long Time { get; } protected static byte[] TimeToBytes(long t); public KeyExpirationTime(bool critical, bool isLongLength, byte[] data); public KeyExpirationTime(bool critical, long seconds); } }