Message in Chinese (Simplified) (中文(简体))
<var>X</var> 必须包含引用方法的单个 ServiceKnownTypeAttribute 或包含一组 ServiceKnownTypeAttributes,每个指定一个有效类型
Unlocalized message
<var>X</var> must contain either a single ServiceKnownTypeAttribute that refers to a method or a set of ServiceKnownTypeAttributes, each specifying a valid type
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