C# 将 null 转换为对象？
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时间：2020-08-04 00:23:59 来源:igfitidea点击:
Casting null as an object?
提问by sthay
I came across this code today
我今天遇到了这个代码
AsyncInvoke(OnTimeMessageTimer, (object)null, (ElapsedEventArgs)null);
Is there anything wrong with it or no?
它有什么问题吗？
采纳答案by Brian Genisio
Sometimes, you need to to this when the method is overloaded... to tell the compiler which one you are calling. A null object is still null and it is safe.
有时，当方法重载时，您需要这样做……告诉编译器您正在调用哪个。null 对象仍然是 null 并且是安全的。
回答by Jimmy
it probably needs the cast to resolve overloads
它可能需要演员来解决重载
