We configure DSL connection using Network Manager. I like to know which file does it edit??

Yesterday, I was searching for this file. Googled alot, asked on #fedora, even I have thrown this question on #nm but didn't find any answer.
After searching for one hours, I have found this of my own and like to share with you all.

When you create a new DSL Connection using Network Manager your configurations are saved at
# cd /etc/NetworkManager/system-connections
Inside this folder you can find all DSL Connection's configuration files.