<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.0" />

Org.BouncyCastle.Tls.DefaultTlsHeartbeat

namespace Org.BouncyCastle.Tls { public class DefaultTlsHeartbeat : TlsHeartbeat { public virtual int IdleMillis { get; } public virtual int TimeoutMillis { get; } public DefaultTlsHeartbeat(int idleMillis, int timeoutMillis); public virtual byte[] GeneratePayload(); } }