<PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />

DerSetGenerator

public class DerSetGenerator : DerGenerator
using System.IO; namespace Org.BouncyCastle.Asn1 { public class DerSetGenerator : DerGenerator { private readonly MemoryStream _bOut = new MemoryStream(); public DerSetGenerator(Stream outStream) : base(outStream) { } public DerSetGenerator(Stream outStream, int tagNo, bool isExplicit) : base(outStream, tagNo, isExplicit) { } protected override void Finish() { WriteDerEncoded(49, _bOut.ToArray()); } public override void AddObject(Asn1Encodable obj) { obj.EncodeTo(_bOut, "DER"); } public override void AddObject(Asn1Object obj) { obj.EncodeTo(_bOut, "DER"); } public override Stream GetRawOutputStream() { return _bOut; } } }