While you might choose to have separate packages for grouping related classes in a real-world plug-in, in this case, there will be only two classes, so there's no need.
尽管在实际的插件中，您可以选择用不同的包对相关的类进行分组，但在本例中，只有两个类，所以不必这样做。
To more cleanly separate the DAL- and BLL-related classes, let's create two subfolders in the App_Code folder, DAL and BLL.
为了更加清晰的区分DAL和BLL的类，我们在App_Code文件夹中建立两个子文件夹，分别命名为DAL和BLL。
Another reason is I have customized classes and will need to replicate twice if I have two separate flavors.
另一个原因是我有定制类和将需要复制两次，如果我有两个不同的口味。
Another reason is I have customized classes and will need to replicate twice if I have two separate flavors.
另一个原因是我有定制类和将需要复制两次，如果我有两个不同的口味。
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