How often you open Windows Notepad to view some C#, C++, XML code? And to change some lines in those file?
Are you do doing it sometimes a day at least? If yes, the tool will be helpful for you.
I discovered it some time before: Programmer's Notepad.
It is still simple and easy-weight application that has is going to help for every developer.
I recommend it as a replacement of Windows Notepad.