<PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />

IVerifier

public interface IVerifier
Operators that reduce their input to the validation of a signature produce this type.
namespace Org.BouncyCastle.Crypto { public interface IVerifier { bool IsVerified(byte[] data); bool IsVerified(byte[] source, int off, int length); } }