<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.2" />

Org.BouncyCastle.Cms.CmsCompressedDataStreamGenerator

namespace Org.BouncyCastle.Cms { public class CmsCompressedDataStreamGenerator { public static readonly string ZLib; public CmsCompressedDataStreamGenerator(); public void SetBufferSize(int bufferSize); public Stream Open(Stream outStream); public Stream Open(Stream outStream, string compressionOid); public Stream Open(Stream outStream, string contentOid, string compressionOid); } }