SmimeEncryptionKeyPreferenceAttribute public class SmimeEncryptionKeyPreferenceAttribute : AttributeX509 Documentation Code public SmimeEncryptionKeyPreferenceAttribute(IssuerAndSerialNumber issAndSer) public SmimeEncryptionKeyPreferenceAttribute(RecipientKeyIdentifier rKeyID) public SmimeEncryptionKeyPreferenceAttribute(Asn1OctetString sKeyID)