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深入理解C＃ 进入快速通道的委托
2022-07-29 10:56:00 【weixin_44326283】
无参返回值的委托可以使用Action<T>作为类型
无参返回值的委托可以使用Predicate<T>作为类型
比较方法的委托可以使用Comparison<T>作为类型
在不需要参数的情况下可以省略参数
委托中定义的变量在委托结束后不会消失，而是继续存在一个类中
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