namespace System.Security.Cryptography.X509Certificates { public sealed class X509SubjectKeyIdentifierExtension : X509Extension { public string SubjectKeyIdentifier { get; } public X509SubjectKeyIdentifierExtension(); public X509SubjectKeyIdentifierExtension(byte[] subjectKeyIdentifier, bool critical); public X509SubjectKeyIdentifierExtension(AsnEncodedData encodedSubjectKeyIdentifier, bool critical); public X509SubjectKeyIdentifierExtension(PublicKey key, bool critical); public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical); public X509SubjectKeyIdentifierExtension(string subjectKeyIdentifier, bool critical); } }