遗漏“虚空”一词与包括“虚空”一样吗？

Question

Are these the same?

public void MyMethod() {do something}

public MyMethod() {do something}

void means return nothing - so leaving this key word out also means return nothing? If this is the case then why does the word exist in the language - is it used in other situations?

Answer 1

Your second option doesn't compile.

C# specs requires that every method returns a type also when there is no result to return.

Methods are declared within a class or struct by specifying the access level, the return value , the name of the method, and any method parameters. ...

As noted by others the exception are class constructors.

Methods (C# Programming Guide) on MSDN .

Answer 2

You always must specify a return type for your methods regardless that its void or a type. Exceptions include constructors.

Answer 3

You can not do the second case in C# , it wil not compile. In C# , you should always specify esplicitly return type, even if it's "nothing".

Answer 4

想想void是没有返回值的占位符，同时保持语法与具有返回类型的函数/方法兼容。

Answer 5

The first line is a public instance method . It can only occur inside a class (or struct ) that is not c itself called MyMethod .

The second example is a public instance constructor . It can occur inside a class which is itself called MyMethod (a strange name for a class, though).