Message in Spanish (Español)
El atributo OperationContractAttribute declarado en el método '<var>X</var>' del tipo '<var>Method name</var>' no es válido. Los atributos OperationContractAttributes sólo son válidos en los métodos declarados en un tipo que tenga el atributo ServiceContractAttribute. Agregue ServiceContractAttribute al tipo '<var>Method name</var>' o quite OperationContractAttribute del método '<var>X</var>'.
Unlocalized message
The <var>X</var> declared on method '<var>Method name</var>' in type '<var>Type Name</var>' is invalid. <var>X</var>s are only valid on methods that are declared in a type that has ServiceContractAttribute. Either add ServiceContractAttribute to type '<var>Type Name</var>' or remove <var>X</var> from method '<var>Method name</var>'.
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