Wrapper class 包裹类 ; 外覆类
Type-Wrapper class 类型包装器类
numeric wrapper class 数值包装类
Food Wrapper Class 食品包装类
You might combine these techniques into a class wrapper for convenience, using some magic methods.
为了方便起见，可以将这些技术组合成一个类包装器。
For example, the marshaler determines that the class wrapper should be used to wrap the interface that was passed into managed code.
例如，封送拆收器确定应当使用类包装来包装传递到托管代码中的接口。
By adding a wrapper class, you have broken subtype polymorphism.
通过添加包装程序类，您打破了子类型的多态性。
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