Handles the reading of unrecognized configuration elements from a configuration file and causes the configuration system to throw an exception if the element cannot be handled.
true if the unrecognized element was deserialized successfully; otherwise, false.
This implementation of ProfilePropertySettingsCollection.OnDeserializeUnrecognizedElement(string, System.Xml.XmlReader) throws specialized errors if the element name is either "clear" or "group". After checking for these conditions, the method then explicitly calls its base implementation, the System.Configuration.ConfigurationElementCollection.OnDeserializeUnrecognizedElement(string, System.Xml.XmlReader) method.