Тип контрактов данных "<var>Type Name</var>" не может быть сериализован с помощью DataContractJsonSerializer, поскольку в иерархии типа повторяется элемент данных "<var>Member</var>".

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The data contract type '<var>Type Name</var>' is not serializable with DataContractJsonSerializer because the data member '<var>Member</var>' is duplicated in its type hierarchy.

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