Thanks Himanshu, I've already look at Nokia Imaging SDK but I can't find anything that match what I want to find or perhaps I don't understand enough the code because my experience with C# is very low. So, could you point me the correct 'keywords' to where should I start the searching ?
My suggestion would be to pickup a good C# book, read it a few times until you at least can the basics, then look at many examples as suggested by @Himanshu to learn, that worked out for me. (However that was way back when I coded in C++ which I. terrible language to learn as the first one, but I'm happy I took the challenge as I learn new languages very fast indeed. (took about 2Weeks to learn C# and 1 week to learn C, javascript a day XD))