using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Lookup
{
class Program
{
static void Main(string[] args)
{
Person graham = new Person("Graham", "Hill", "USA");
Person emerson = new Person("Emerson", "Fittipaldi", "USA");
Person hc = new Person("Huang", "Cong", "CA");
List<Person> listPerson = new List<Person>() { graham, emerson, hc };
Lookup<string, Person> Persons = (Lookup<string, Person>)listPerson.ToLookup(r => r.Counary);
foreach (Person obj in Persons["USA"])
{
Console.WriteLine(obj.FirstName + " "+ obj.LastName);
}
}
}
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string Counary { get; set; }
public Person(string first, string last,string counary)
{
FirstName = first;
LastName = last;
Counary = counary;
}
}
}
