>Bonnie, does that work in C# too?

even though I'm not Bonnie, I can answer that: Nope, you can't do that in C#. C# is much more strict about it, and when you are trying to call a method, you have to pass all the parameters, otherwise you won't be able to compile the code. If you really want an "optional" parameter, you'll have to overload the method, creating one version with and another version without the parameter.