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别再以为 readonly 就是“不能改”了!C# 中的坑,90% 的 ...
你第一次学 C# 的时候,看到 readonly这个关键字,可能觉得它很简单: ★ “哦,就是这个字段只能赋值一次,之后不能再改。” 没错,对于 int、string这种基础类型,确实是这样。 但一旦你开始用它来修饰一个类对象或者集合,你会发现: 咦?对象里的属性怎么还能改?! 别急,这不是编译器出 bug ...
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