Контракту требуется свойство TwoWay (либо типа запрос-ответ, либо дуплексное), однако привязка "<var>X</var>" его не поддерживает или этого не позволяет неправильная настройка.

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Contract requires TwoWay (either request-reply or duplex), but Binding '<var>X</var>' doesn't support it or isn't configured properly to support it.

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