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文章 2022-02-16 来自：开发者社区

c#强制转换之as is用法解析

as 运算符类似于类型转换，所不同的是，当转换失败时，as运算符将产生空，而不是引发异常。在形式上，这种形式的表达式： expression_r as type as运算符只执行引用转换和装箱转换。 as运算符无法执行其他转换，如用户定义的转换，这类转换应使用case表达式来代替其执行。关于is的其实也差不多，只是IS不会帮你进行任何的转换。所以需要自已进行显示转换。 is操作符进...

文章 2022-02-16 来自：开发者社区

C# yield return 用法与解析

原文:C# yield return 用法与解析 C# yield return 用法与解析本文参考自：http://www.jb51.net/article/54810.htm 当初没有认真理解 yield 这个关键字，现在又遇到了依旧不理解，为了以后不再为了 yield 困惑，决定好好研究一下 yield 的用法与意义： yield 从字面上理解有“退位，屈服”的意...

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更新时间 2024-07-18 15:48:05

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