Best way to get a List of a property of T from a List<T>

Question

I've got a List<Users> - Users have a Username property.

What I want to know is - is there an better way to get a List<string> of all the Usernames than to simply loop through and build up my new list?

Answer 1

Use LINQ:

List<string> usernames = users.Select(u => u.UserName).ToList();

Answer 2

Like this:

List<string> userNames = users.ConvertAll(u => u.UserName);

Note that the userNames list will not reflect subsequent changes to the users or their UserNames.