<PackageReference Include="BouncyCastle.Cryptography" Version="2.7.0" />

Org.BouncyCastle.Tls.SupplementalDataEntry

public sealed class SupplementalDataEntry
namespace Org.BouncyCastle.Tls { public sealed class SupplementalDataEntry { public int DataType { get; } public byte[] Data { get; } public SupplementalDataEntry(int dataType, byte[] data); } }