ToDictionary for an object list : ToDictionary « LINQ « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. LINQ
3. ToDictionary

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class Employee {
    public int id;
    public string firstName;
    public string lastName;

    public static ArrayList GetEmployeesArrayList() {
        ArrayList al = new ArrayList();
        al.Add(new Employee { id = 1, firstName = "J", lastName = "R" });
        al.Add(new Employee { id = 2, firstName = "W", lastName = "G" });
        al.Add(new Employee { id = 3, firstName = "A", lastName = "H" });
        al.Add(new Employee { id = 4, firstName = "D", lastName = "L" });
        al.Add(new Employee { id = 101, firstName = "K", lastName = "F" });
        return (al);
    }

    public static Employee[] GetEmployeesArray() {
        return ((Employee[])GetEmployeesArrayList().ToArray());
    }
}
public class MainClass {
    public static void Main() {
        Dictionary<int, string> eDictionary = Employee.GetEmployeesArray().ToDictionary(k => k.id, i => string.Format("{0} {1}",i.firstName, i.lastName));
        string name = eDictionary[2];
        Console.WriteLine("Employee whose id == 2 is {0}", name);
    }
}