Building the list of classes requires gathering information from your application while it runs, or using a utility that can determine which classes your application will load.

构建类列表需要在应用程序运行时从其中收集信息，或者使用一个实用工具来确定应用程序将加载哪些类。

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If you implement the quick and easy approach I've described, you can make your Web application load drop-down list items just once for the duration of the application's runtime.

如果您实施了本文介绍的便捷方法，就能使您的Web应用程序在应用程序运行时期间仅加载下拉列表项一次。

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