【文章內(nèi)容簡介】 ............................................................ 62 委托實例相等性 ............................................................................................................................ 63 明確賦值 ....................................................................................................................................... 63 方法組轉(zhuǎn)換 ................................................................................................................................... 64 目錄 版權所有 ? Microsoft Corporation 19992020。 保留所有權利。 v 委托創(chuàng)建表達式 .......................................................................................................................... 65 實現(xiàn)示例 ..................................................................................................................................... 65 22. 迭代器 ................................................................................................................................................ 69 迭代器塊 ....................................................................................................................................... 69 枚舉器接口 ..............................................................................................................................69 可枚舉接口 ..............................................................................................................................69 產(chǎn)生類型 ..................................................................................................................................69 this 訪問 ...................................................................................................................................70 枚舉器對象 ................................................................................................................................... 70 MoveNext 方法 .........................................................................................................................70 Current 屬性 .............................................................................................................................71 Dispose 方法 ............................................................................................................................71 可枚舉對象 ................................................................................................................................... 72 GetEnumerator 方法 ..................................................................................................................72 yield 語句 ....................................................................................................................................... 72 明確賦值 ..................................................................................................................................74 實現(xiàn)示例 ....................................................................................................................................... 74 23. 分部類型 ............................................................................................................................................ 81 分部聲明 ....................................................................................................................................... 81 屬性 .........................................................................................................................................81 修飾符 ......................................................................................................................................82 類型參數(shù)和約束 .......................................................................................................................82 基類 .........................................................................................................................................82 基接口 ......................................................................................................................................83 成員 .........................................................................................................................................83 名稱綁定 ....................................................................................................................................... 84 24. 可空類型 ............................................................................................................................................ 85 可空類型 ....................................................................................................................................... 85 成員 .........................................................................................................................................85 默認值 ......................................................................................................................................86 值類型約束 ..............................................................................................................................86 轉(zhuǎn)換 .............................................................................................................................................. 86 null 文本轉(zhuǎn)換 ...........................................................................................................................86 可空轉(zhuǎn)換 ..................................................................................................................................86 裝箱和取消裝箱轉(zhuǎn)換 ................................................................................................................87 允許的用戶定義轉(zhuǎn)換 ................................................................................................................87 用戶定義轉(zhuǎn)換的計算 ................................................................................................................88 提升的轉(zhuǎn)換 .............................................................................................