using System;

using System.Collections;

using System.Collections.Generic;

​

public class Program

{

    public static void Main(string[] args)

    {

        // Simple initialization of an object

        Employee emp = new Employee()

        {

            ID = 6,

            FirstName = "Code",

            LastName = "Monkey",

            StartDate = DateTime.Now

        };

        Console.WriteLine(emp.GetType());

​

        // An array of strings

        var names = new string[] { "Code Moneky", "Scrum Master", "Product Owner", "Mr. Quality" };

        Console.WriteLine(names.GetType());

​

        // A simple Hashtable

        var ht = new Hashtable {

                { "Apple", 5 },

                { "Banana", 12 },

                { "Citrus", 6 },

            };

        Console.WriteLine(ht.GetType());

​

        // A simple Lookup/Dictionary

        var lookup = new Dictionary<string, string> {

                { "A", "Apple" },

                { "B", "Banana" },

                { "C", "Citrus" },

            };

        Console.WriteLine(lookup.GetType());

​

        // A Dictionary of Dictionaries

        var groceries = new Dictionary<string, Dictionary<string, int>> {

                { "Fruits", new Dictionary<string, int> { { "Apple", 5 }, { "Banana", 12 }, { "Citrus", 16 } } },

                { "Vegetables", new Dictionary<string, int> { { "Tomatoes", 4 }, { "Eggplant", 1 }, { "Bell Pepper", 4 } } },

            };

        Console.WriteLine(groceries.GetType());

​

        // A Simple KeyValuePair

        var pair = new KeyValuePair<int, Employee>(1,

            new Employee()

            {

                ID = 1,

                FirstName = "Code",

                LastName = "Monkey",

                StartDate = DateTime.Now

            }

        );

        Console.WriteLine(pair.GetType());

​

        // A collection of objects

        var collection = new ArrayList

            {

                emp,

                names,

                ht,

                lookup,

                groceries,

                pair

            };

        Console.WriteLine(collection.GetType());

​

        // A collection of string objects

        var colors = new List<string>

            {

                "red",

                "green",

                "blue",

                "orange",

                "yellow"

            };

        Console.WriteLine(colors.GetType());

​

        // Anonymous object

        var city = new

        {

            City = "Portland",

            State = "Oregon"

        };

        Console.WriteLine(city.GetType());

        Console.WriteLine(city.City + ", " + city.State);

​

        // Anonymous objects array

        var cities = new[]

        {

            new {

                City = "Portland",

                State = "Oregon"

            },

​

            new {

                City = "San Francisco",

                State = "California"

            },

​

            new {

                City = "Seattle",

                State = "Washington"

            },

        };

        Console.WriteLine(cities.GetType());

        Console.WriteLine(cities[1].GetType());

        Console.WriteLine(cities[2].City + ", " + cities[2].State);

    }

}

​

public class Employee

{

    public int ID { get; set; }

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public DateTime StartDate { get; set; }

}