Message in Korean (한국어)![](/img/flags/ko.png)
Add(<var>Y</var>) 메서드는 <var>Z</var>에서 상속되므로 <var>X</var>에서 이 메서드를 구현해야 합니다.
Unlocalized message![](/img/flags/en.png)
To be XML serializable, types which inherit from <var>Z</var> must have an implementation of Add(<var>Y</var>) at all levels of their inheritance hierarchy. <var>X</var> does not implement Add(<var>Y</var>).
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