namespace Org.BouncyCastle.Asn1 { public abstract class Asn1Null : Asn1Object { public static Asn1Null GetInstance(object obj); public static Asn1Null GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit); public static Asn1Null GetOptional(Asn1Encodable element); public static Asn1Null GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit); } }