No. C++/CLI is not an extension! It's a new language that cares strongly about backwards compatibility to C++.
Stringer: no offence, but you apparently don't really understand scoping or classes. Please, do yourself a favour and learn the basics of C++ first. Then, if you really, really need to, you can learn C++/CLI. The way you're doing it now, you'll only get confused and write code that will eventually be featured on http://www.thedailywtf.com/ . It is the wrong approach.