Message in Chinese (Traditional) (中文(繁體))
<var>X</var> 必須包含參照方法的單一 ServiceKnownTypeAttribute,或是一組 ServiceKnownTypeAttribute,兩者皆必須指定有效型別
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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