NewLine symbol for Notepad under different operating systems

I was in the company during the day to do the development of Linux systems, the evening back to home windows.

Today in the company sent a mail, attachment is a notepad, back home to download the attachment, open Notepad, but changed the way, the place of the line change did not change lines, but appeared, a mess.

Then think of it, on the internet seems to have seen some introduction, said that in different operating systems, file line breaks are different

Linux system under:/N

Under Windows system:/r/n