Message in Chinese (Simplified) (中文(简体))
操作 <var>X</var> 具有属性为 MessageContractAttribute 的参数或返回类型。要使用 Message Contract 表示请求消息，操作必须有一个属性为 MessageContractAttribute 的参数。要使用 Message Contract 表示响应消息，操作的返回值必须是属性为 MessageContractAttribute 的类型并且不能有 out 或 ref 参数。
Unlocalized message
The operation <var>X</var> either has a parameter or a return type that is attributed with MessageContractAttribute. In order to represent the request message using a Message Contract, the operation must have a single parameter attributed with MessageContractAttribute. In order to represent the response message using a Message Contract, the operation's return value must be a type that is attributed with MessageContractAttribute and the operation may not have any out or ref parameters.
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