/*

A Struct is created exactly like a Class. Notice the example below. 

A few notes on structs:

 -Structs cannot inherit from other structs. 

 -Think of a struct as a lightweight class.

 -Do some reading on the advantages of using a struct versus a class here:

    https://msdn.microsoft.com/en-us/library/ms229017(v=vs.110).aspx

​

*/

​

using System;

using System.Collections.Generic;

​

// Structs

​

struct AddressBookEntry {

    //Variables

    public string FirstName;

    public string LastName;

    public int Age;

    public string AddressLine1;

    public string AddressLine2;

    public string City;

    public string State;

    public string ZIP;

    //Custom Methods

    public string GetAddress()

    {

        var result = String.Format("Address: {0}{4}\nCity: {1}\nState: {2}\nZIP: {3}",

                             /* 0 */ this.AddressLine1, 

                             /* 1 */ this.City, 

                             /* 2 */ this.State,

                             /* 3 */ this.ZIP,

                             /* 4 */ String.IsNullOrWhiteSpace(this.AddressLine2) ?

                             "" : String.Format("\n{0}", this.AddressLine2)

                            );

        return result;

    }

}

​

var Paul = new AddressBookEntry();

​

Paul.AddressLine1 = "123 Coder Boulevard";

Paul.AddressLine2 = "Attn: Awesomeness";

Paul.City = "Westfield";

Paul.State = "IN";

Paul.ZIP = "46074";

​

var Gavin = new AddressBookEntry() {

    FirstName = "Gavin",

    LastName = "Robley",

    AddressLine1 = "123 Please Fix My Computer Blvd.",

    City = "San Bernadino",

    State = "CA",

    ZIP = "90210"

};

​

Console.WriteLine(Paul.AddressLine1);

Console.WriteLine("Gavin's address is {0}", Gavin.AddressLine1);

Console.WriteLine(Paul.GetAddress());

​

var addresses = new List<AddressBookEntry>();

addresses.Add(Paul);

addresses.Add(Gavin);

​

//Another way to create an object and add a full entry. 

addresses.Add(new AddressBookEntry() {

    FirstName = "Scott",

    LastName = "Jones",

    AddressLine1 = "1150 West 116th St",

    City = "Carmel",

    State = "IN",

    ZIP = "46032"

});

​

Console.WriteLine(addresses.Count);

​

Console.WriteLine("                      ");

Console.WriteLine("                      ");

​

​

foreach (var address in addresses)

{

    Console.WriteLine(address.GetAddress());

}

​

​

​

​

​

addresses.Add(new AddressBookEntry() {

    FirstName= "Geoff",

    LastName= "Simone",

    AddressLine1= "1234 Somewhere Place",

    City="Carmel",

    State="IN",

    ZIP="46072"

});

​

Console.WriteLine(addresses.Count);

​

foreach (var address in addresses)

{

    Console.WriteLine(address.GetAddress());

}