C# Action(arg) 和 Action.Invoke(arg) 的区别

they both compile to the same IL. One is shorthand for the other. The only possible benefit I can see is that you can check for null and call it using newer c# features when using invoke, e.g. x?.Invoke(“1”) will call the delegate only if it’s not null.

All delegate types have a compiler-generated Invoke method.
C# allows you to call the delegate itself as a shortcut to calling this method.

在编译成 IL 的时候，都是一样的，所以没有区别，为了防止空的调用导致异常，我们建议一般使用

Action?.invoke(arg)