The CryptoCrl object represents a Certificate Revocation List (CRL), which
is a signed package containing a list of serial numbers and revocation
dates of certificates which a Certification Authority has chosen to revoke.
An instance of the CryptoCrl object representing an existing CRL is obtained via the CryptoManager.ImportCrlFromFile
method or CryptoStore.CRLs collection. An empty CryptoCrl object
is created via the CryptoContext.CreateCRL method.