using System;

using System.Collections.Generic;

public class Customer

{

    public int ID { get; set; }

    public string Name { get; set; }

}

​

public class Program

{

public static void Main()

{

    Dictionary<int, Customer> customers = new Dictionary<int, Customer>();

    Customer jane = new Customer { ID = 0, Name = "Jane" };

    Customer joe = new Customer { ID = 1, Name = "Joe" };

    customers.Add(jane.ID, jane);

    customers[joe.ID] = joe;

    foreach (int key in customers.Keys)

    Console.WriteLine(customers[key].Name);

    Dictionary<int, Customer> customers2 = new Dictionary<int, Customer>

    {

        [0] = new Customer { ID = 0, Name = "Chris" },

        [1] = new Customer { ID = 1, Name = "Alex" }

    };

}

}

​

/*

7

A Dictionary in the previous example takes two type parameters for the key and value,

respectively. The first example instantiates the dictionary to take an int key and Customer

value. The Customer class has two properties, where the ID will be used as a key for the

dictionary. Notice the two different ways you can add values to a dictionary, via the Add method

or indexer assignment. The first parameter to Add is the index and the second is the value.

When using the indexer, put the index in brackets and assign the value.

​

​

*/