Question

Yeah, poorly worded question, but I really wasn’t sure how to phrase it. 🙂

Let’s say I have a simple class that looks like this:

public class Contact
{
    public string Name { get; set; }
    public string PhoneNumber { get; set; }
}

and I have an List<> of them. Well, I’d like to be able to get a List of all Names, just like Dictionary<T,U> lets me do something like Dictionary.Keys.ToArray() and Dictionary.Values.ToArray(). Currently, I’m doing the obvious thing, which is to loop over the array of Contacts and create my own Array. I could be naive, but I just thought there might be a Dictionaryish way to get at it in one line of code.

Answer 1

Assuming the list is named contacts, here is a linq query that should give you an array of names:

var names = (from c in contacts select c.Name).ToArray();

Note: it first creates an IEnumerable<string> then converts it to an array.