this is probably a simple question, but I'm only a beginner so...

Suppose I have a table containing home-work locations (cities) certain people use. Something like: ID(int), namePerson(string), homeLocation(string), workLocation(string) where homeLocation and workLocation can both be null.

Now I want all the different locations that are used merged into a single list. Something like:

var homeLocation =
from hm in Places
where hm.Home != null
select hm.Home;

var workLocation =
from wk in Places
where wk.Work != null
select wk.Work;

List<string> locationList = new List<string>();
locationList = homeLocation.Distinct().ToList<string>();
locationList.AddRange(workLocation.Distinct().ToList<string>());

(which I guess would still allow duplicates if they have the same value in both columns, which I don't really want...)

My question: how this be put into a single LINQ statement?

Thanks in advance for your help!