System.Xml.XmlDictionaryReader.StartCanonicalization C# (CSharp) Méthode

        public virtual void StartCanonicalization(Stream stream, bool includeComments, string[] inclusivePrefixes)
        {
            throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException());
        }

 internal override SecurityTimestamp ReadTimestamp(XmlDictionaryReader reader, string digestAlgorithm, SignatureResourcePool resourcePool)
 {
     DateTime maxUtcDateTime;
     byte[] buffer;
     bool flag = (digestAlgorithm != null) && reader.CanCanonicalize;
     HashStream stream = null;
     reader.MoveToStartElement(System.ServiceModel.XD.UtilityDictionary.Timestamp, System.ServiceModel.XD.UtilityDictionary.Namespace);
     if (flag)
     {
         stream = resourcePool.TakeHashStream(digestAlgorithm);
         reader.StartCanonicalization(stream, false, null);
     }
     string attribute = reader.GetAttribute(System.ServiceModel.XD.UtilityDictionary.IdAttribute, System.ServiceModel.XD.UtilityDictionary.Namespace);
     reader.ReadStartElement();
     reader.ReadStartElement(System.ServiceModel.XD.UtilityDictionary.CreatedElement, System.ServiceModel.XD.UtilityDictionary.Namespace);
     DateTime creationTimeUtc = reader.ReadContentAsDateTime().ToUniversalTime();
     reader.ReadEndElement();
     if (reader.IsStartElement(System.ServiceModel.XD.UtilityDictionary.ExpiresElement, System.ServiceModel.XD.UtilityDictionary.Namespace))
     {
         reader.ReadStartElement();
         maxUtcDateTime = reader.ReadContentAsDateTime().ToUniversalTime();
         reader.ReadEndElement();
     }
     else
     {
         maxUtcDateTime = System.ServiceModel.Security.SecurityUtils.MaxUtcDateTime;
     }
     reader.ReadEndElement();
     if (flag)
     {
         reader.EndCanonicalization();
         buffer = stream.FlushHashAndGetValue();
     }
     else
     {
         buffer = null;
     }
     return new SecurityTimestamp(creationTimeUtc, maxUtcDateTime, attribute, digestAlgorithm, buffer);
 }