What's a “static method” in C#?

Question

What does it mean when you add the static keyword to a method?

public static void doSomething(){
   //Well, do something!
}

Can you add the

Answer 1

Static function means that it is associated with class (not a particular instance of class but the class itself) and it can be invoked even when no class instances exist.

Static class means that class contains only static members.