Get specific property from all items from the list

Question

I have list of Contacts:

public class Contact
{
    private string _firstName;
    private string _lastName;
    private int _age;

    /// 

         


        

Answer 1

public List<string> FirstNames
{
    get
    {
       return _contactList.Select(C => C.FirstName).ToList();
    }
}

Answer 2

You want to use the Select method, not Where here:

_contactList.Select(C => C.FirstName).ToList();

Further, the need for the ToList() only exists because the property demands it. You could return an IEnumerable<string> instead if you wanted to get rid of that.