Message in French (Français)
Le contrat de rappel du contrat <var>Contract Name</var> n’existe pas ou ne définit aucune opération. S’il ne s’agit pas d’un contrat duplex, envisagez d’utiliser ChannelFactory au lieu de DuplexChannelFactory.
Unlocalized message
The callback contract of contract <var>Contract Name</var> either does not exist or does not define any operations. If this is not a duplex contract, consider using ChannelFactory instead of DuplexChannelFactory.
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