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

IEncoder

public interface IEncoder
using System.IO; namespace Org.BouncyCastle.Utilities.Encoders { public interface IEncoder { int Encode(byte[] data, int off, int length, Stream outStream); int Decode(byte[] data, int off, int length, Stream outStream); int DecodeString(string data, Stream outStream); } }