三元运算符C＃速记

Question

我有一个类Segment，它有四个类PricingDetailPer PricingDetailPerAdult，PricingDetailPerChild，PricingDetailPerSenior，PricingDetailPerInfant的实例，它们都具有属性{{1 }}。

在代码中，我需要获取属性Availability，但是我需要检查Parent是否存在。是否有这样的速记：

Availability

return segment.PricingDetailPerAdult != null ? (this.Availability) : (continue checking); 是指this还是我检查的其他某些属性？

Answer 1

return segment.PricingDetailPerAdult?.Availability
       ?? segment.PricingDetailPerChild?.Availability
       ?? segment.PricingDetailPerSenior?.Availability
       ?? segment.PricingDetailPerInfant?.Availability;

参考：

Null-conditional operators ?. and ?[]
?? operator