Message in Chinese (Simplified) (中文(简体))
回调方法 <var>Method name</var> 不受支持，如果未使用 OperationContractAttribute 标记方法或其接口类型不是 ServiceContractAttribute 的 CallbackContract 的目标，则会出现此情况。
Unlocalized message
Callback method <var>Method name</var> is not supported, this can happen if the method is not marked with OperationContractAttribute or if its interface type is not the target of the ServiceContractAttribute's CallbackContract.
Search by Google