While this thread might be repoened lets get a couple things straight:
1. It's is not our responsibility to make sure you credit your sources.
2. It is not right to claim others work as your own, in order to make urself look good.
There is nothing wrong with sharing a tutorial that you found interesting, preferably not from a rival site though, but if you want to link to MSDN, or even share some interesting snippets that is no big deal, but you can not just outright use someone else's work without even attempting to mention them.