How to remove green line near breakpoint in visual studio 2010?

Question

I have no idea what this line means, how it got there or how to delete it.

Answer 1

The colored lines on the side of the Visual Studio text editor show lines that have been changed since opening and are not saved (yellow) or saved (green).

This is a convenient way to quickly find out what changes you made to the file at a glance. However, if you want to disable it, you can switch it by going to Tools → Options → Text Editor and uncheck the Track Changes checkbox.

Answer 2

This marker saves the changes made to your working directory since the last time you opened the visual studio. I find this feature very useful, especially when working with a team. You can turn them off from the settings if you really hate them, but I would recommend using them because they will save you time in the long run.