That is fine. I am merely pointing out that you shouldn't blindly put using namespace statements for every namespace you encounter.
Especially phantomotap seemed to think that explicitly specifying namespaces was like the old C days when you had to spell it all out. Or at least it seemed that way.
I didn't agree, because I use namespaces for categorizing. And the using isn't evil; there are places where it helps, like in your example, and others where it does not.
Myself, if it is not too long, I do prefer to type it out explicitly.