Der Typ "<var>Type Name</var>" kann nur von einem Typ erben, der mit DataContractAttribute oder SerializableAttribute gekennzeichnet ist. Sie sollten den Basistyp "X" mit DataContractAttribute oder SerializableAttribute kennzeichnen oder diese aus dem abgeleiteten Typ entfernen.

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Type '<var>Type Name</var>' cannot inherit from a type that is not marked with DataContractAttribute or SerializableAttribute. Consider marking the base type 'X' with DataContractAttribute or SerializableAttribute, or removing them from the derived type.

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