В десериализаторе отсутствует информация о типе для десериализации. Добавьте тип, указанный в XML как тип производства, к списку известных типов, например, с помощью атрибута KnownTypeAttribute.

Message in Russian (Русский)

Unlocalized message

The deserializer has no knowledge of the type to use during deserialization. Consider adding the type specified as factory type in the XML to the list of known types - for example by using the KnownTypeAttribute attribute.

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