Below are some common responses to the question:
- It is more efficient
- It creates an object
- It is more readable
- It turns into better IL code
- It is easier to type
- It is easier to understand for newbies
- It can be used in a switch statement
- It ...
My conclusion to my extensive research is that it doesn't matter. Performance is not an issue when using either in a real life application. When you are looking at code and come across this, don't change "" to string.empty or vice versa. You are wasting your time and adding history to a file that does not need to be there. You are not following the Boy Scout Rule because the file is not in a better place than you left it, it is in the same place.
I am open to hearing thoughts on this to feed my OCD, but from everything that I have read I don't think there is anything new that would support one being so much better over the other. It has been and still is in my category of personal preference.
peace yo!