Message in Spanish (Español)
La operación '<var>X</var>' en el contrato '<var>Contract Name</var>' ya tiene un comportamiento '<var>Y</var>' y, por tanto, no se puede agregar otro. Esto indica normalmente que ya se ha llamado al método IOperationSerializer.ApplyToOperation para esta operación.
Unlocalized message
Operation '<var>X</var>' in contract '<var>Contract Name</var>' already has a '<var>Y</var>' behavior, so a new one cannot be added. This usually indicates that the IOperationSerializer.ApplyToOperation method has already been called for this operation.
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