public void ReadFrom(XmlDictionaryReader reader, TransformFactory transformFactory, DictionaryManager dictionaryManager)
{
reader.MoveToStartElement(dictionaryManager.XmlSignatureDictionary.Transforms, dictionaryManager.XmlSignatureDictionary.Namespace);
this.prefix = reader.Prefix;
reader.Read();
while (reader.IsStartElement(dictionaryManager.XmlSignatureDictionary.Transform, dictionaryManager.XmlSignatureDictionary.Namespace))
{
string attribute = reader.GetAttribute(dictionaryManager.XmlSignatureDictionary.Algorithm, null);
Transform transform = transformFactory.CreateTransform(attribute);
transform.ReadFrom(reader, dictionaryManager);
this.Add(transform);
}
reader.MoveToContent();
reader.ReadEndElement();
if (this.TransformCount == 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CryptographicException(System.IdentityModel.SR.GetString("AtLeastOneTransformRequired")));
}
}
