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

Org.BouncyCastle.Pkix.ReasonsMask

sealed class ReasonsMask
This class helps to handle CRL revocation reasons mask. Each CRL handles a certain set of revocation reasons.
namespace Org.BouncyCastle.Pkix { internal sealed class ReasonsMask { } }