C#

static List<Person> _person = new List<Person>();
static void Main()
{
    Dictionary<string, Action> methodList = new Dictionary<string, Action>();

    methodList.Add("1", (() =>
        _person.ForEach(s => Console.WriteLine("{0} {1}", s.Name, s.Title))));

    _person.Add(new Person( "James","Prog" ));
    _person.Add(new Person( "Claire","Illu"));

    Console.WriteLine("Press 1 to show all data or 2 to quit");

    string input = Console.ReadLine();
    if (methodList.ContainsKey(input)) methodList[input]();

    Console.Read();

}