Another Little C# Thing I didn't know

Sometimes I don't think I know much about C# (or anything else for that matter).

I didn't know you could do this:

static void two(string x, int num=1)

in this, the parameter "num" is optional. I didn't know you could optional parameters in C#. I've been looking at C# code since C# has been around -- code reviews, my own code, samples on the internet -- but I can't recall ever seeing anyone use this.

Here's a code sample.

        static void Main(string[] args)
        {
            two("one", 2);
            two("two");
        }
 
        static void two(string x, int num=1)
        {
            Console.WriteLine(x + " " + num);
        }

You can also used named parameters. So this also works:
        two(num:7, x :"named");
(at least in .Net 2.0 and later).
I remember named and optional parameters in VB4,
but I was completely clueless that you could do it in C#.

Now, we're all a tiny bit less clueless.
--kevin