El control con el id. ID '<var>X</var>' que se está registrando mediante RegisterAsyncPostBackControl o RegisterPostBackControl debe implementar INamingContainer, IPostBackDataHandler o IPostBackEventHandler.

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Control with ID '<var>X</var>' being registered through RegisterAsyncPostBackControl or RegisterPostBackControl must implement either INamingContainer, IPostBackDataHandler, or IPostBackEventHandler.

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