Hi am a new user i am a software developer i have been using microsoft windows an have never used any kind of Linux Waht i wan a know is that which linux will be best for me

There's no single good answer to that question. Since you're new to Linux I would suggest either Fedora or Ubuntu. I favor Ubuntu due to package management. They both have excellent hardware detection, they're both good for newbies, and they both have excellent repositories available to install software from.

What distribution is best comes down to what you're going to be using the system for. You mentioned that you're a software developer, but do you want to program in C? C++? Java? Mono? Do you have particular requirements for versioning in your development tools? What IDE Capabilities do you need? How else do you plan on using the system? Multimedia? Emulation? Home Server? Etc.

Hi There,
If you are going to start this now then it will be best to start either with Fedora or with RedHat Linux. since these are the very basic and most commanly used flavours of linux these days and I am quite sure that u will love to learn them .

Anyways, welcome to LinuxQuestions....

Cheers,
kapil

as been said: there`s no good answer on that question.
have a look at distrowatch:
http://distrowatch.com/
the ones mentioned by linuxshop-advertisement are all fine (imo).
make use of them as live-cd`s and the ones you might handle out of the box are the right ones for now (chances are high you will someday use another distro anyway, no need to get a headache on that).

so long.

Anything in the top ten on the "hit list" at Distrowatch (link above)

I would NOT recommend RedHat (paid version). Fedora--yes.