Message in Italian (Italiano)
Poiché ServiceContract di base '<var>Contract Name</var>' contiene un CallbackContract 'X', anche il ServiceContract derivato 'Y' deve specificare come CallbackContract 'X' o un tipo derivato.
Unlocalized message
Because base ServiceContract '<var>Contract Name</var>' has a CallbackContract 'X', derived ServiceContract 'Y' must also specify either 'X' or a derived type as its CallbackContract.
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