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在多个文件中实现了与首选项(Preferences)相关的枚举、类和方法,主要用于管理和操作首选项数据。包括定义首选项值类型、错误码、存储模式,以及实现首选项、选项、键值对和首选项值的访问接口。同时添加了与原生 API 交互的方法,并管理非托管内存的分配和释放。