Question

Main Goal:

As the title says I would like a way to retrieve the windows 8 product
key. A C# example would be preferable but C++ would work as well. If
anyone has a solution in some other form if you could post it perhaps
I can figure it out.

Reasoning:

I have been recently put in charge of maintaining the company laptops.
The previous person in charge did not keep track of the MSDN keys
assigned. I would like to build a catalog of each and every product
serial including the installed operating system. Currently unless
using a ghost image or other means I’d have to use a new serial After
spending a few hours on Google I already have many ways to get all
previous versions of Windows except eight. Such as Retrieve Windows
Seven Product Key

Answer 1

I am not sure if this sample application is compatible to retrieve windows 8 product keys but you could at least give it a shot and see if it works or not

Its called Windows Product Key Finder and its available at codeplex:

A small tool for finding your Windows product key. No install required, just a single executable file. 
Its open source so you can actually see what the program is doing with your key :P

http://wpkf.codeplex.com/