is it C or C++ programming is used to create the whole linux?
i also wonder, what microsoft used to create windows?
i learned C and C++,
how can that language create something so great?

C and lots, and lots of time with plenty of help from the community. No one person created Linux, Windows is broken creating a broken OS isn't too hard

GNOME = C
KDE = C++
WINDOWS = C

just wonder how can C created so powerful OS?
the C we learn in school of course is not able to do it, right?
Even knowing the whole book of C written by Deitel, can u do it?
Is it Advanced Learner's C? OR something else not in the book ?

Of course. C is C.

I don't know what you learned in school, but probably they did not spend too much time on advanced memory management or low-level hardware control, or any of the other thousands of issues you must master to develop a usable OS.

If you want to see how it is done, well, the kernel source is out there for you to read at your leisure.

It should also be noted that the linux kernel is not strictly C, some of the architecture specific details are actually written in assembly, see for example /usr/src/linux/arch/i386/boot/setup.S which grabs info from the BIOS...

Well. I know how to cut my hand using a scalpel, but don't really excell in brain surgery
Basic understanding of tools is just the very beginning of it.

i learn C#,
can i contribute to developing linux packages?

No...

C# is a $MS bastardisation of C isn't it? Only compiles on Win32?

In any event, Linus won't even allow C++ in the kernel, even after being pressured.

So for the time being, it's C only...

It is more a kind of Java, without the portability.

who in the world would pressure for all that higher level structural crap in the kernel ? That would make no sense at all.

Well, every once in a while someone posts to the LKML asking if they can submit kernel drivers written in C++...

Maybe 'pressure' was the wrong word

I would that there is really a very practical reason why C++ is not used in kernel space. These are powerful and convenient languages, but they require a lot of "runtime library" support to do what they do. These languages are designed to run in an operating-system environment, with a slew of lower level routines, exception-handling support, and so on. Since the kernel is in the business of providing these niceities to its clients, it doesn't have many of them for itself. The environment in which the kernel runs is much more austere.

There are a lot of "object-style" implementations to be found throughout the kernel, such as (for example) the device-driver interface and filesystem-driver interfaces; they are simply implemented "by hand." And they are stripped-down, minimal, as is all of the kernel. It is critical for any kernel coder to always know exactly what will happen when her code is executed on the machine.

In a lot of ways, the kernel consists of a bunch of over-glorified subroutines, responding endlessly to system-calls and other interrupts. It's not a huge program by any means, although it is complicated. It's designed to be small and fast, and sturdy, "no matter what." But it is, always, only the nucleus of what's going on. It is only "the system control program," master of the hardware and thus inextricably tied to it. Most of what you think of as "the Linux system/environment" is actually found in shared libraries which are wrapped-around the kernel, so to speak. And you are quite free to use C++ or anything-else-you-like there.

Mono!

Remember, Microsoft originally proposed C# as an open standard and open source developers have embraced it.

http://www.mono-project.com/Main_Page