What do the green highlighted areas mean?
The green highlighted areas denote replacement fields in the IntelliSense code snippet. These fields are formatted so that you can easily contextualize the code snippet to the task you are setting out to achieve in your own application. You can navigate between replacement fields by hitting Tab. You can also invoke an IntelliSense completion list to view potential replacements for the currently selected replacement by typing Ctrl+Space. Once the file is closed, the code is committed and the replacements disappear.