通过为现有旧式文件维护正确的引用数，安装程序可在卸载应用程序时确定是否删除旧式文件。
By maintaining a correct reference count for existing legacy files, the installer can determine whether to delete legacy files when it uninstalls the application.
通过为现有旧式文件维护正确的引用数，安装程序可在卸载应用程序时确定是否删除旧式文件。
By maintaining a correct reference count for existing legacy files, the installer can determine whether to delete legacy files when it uninstalls the application.
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