using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var person = new Person("Ryan","Fiorini");

        Console.WriteLine($"person: {person.FirstName} {person.LastName}");

        ChangeFirstName(person);

        Console.WriteLine($"person: {person.FirstName} {person.LastName}");

        PrintObjectCategory("person", person.GetType());

        Console.WriteLine();

        var person2 = new Person2("Ryan","Fiorini");

        Console.WriteLine($"person2: {person2.FirstName} {person2.LastName}");

        ChangeFirstName2(person2);

        Console.WriteLine($"person2: {person2.FirstName} {person2.LastName}");

        PrintObjectCategory("person2", person2.GetType());

​

        Console.WriteLine();

        var person3 = new Person3();

        person3.FirstName = "Ryan";

        person3.LastName = "Fiorini";

        Console.WriteLine($"person3: {person3.FirstName} {person3.LastName}");

        ChangeFirstName3(person3);

        Console.WriteLine($"person3: {person3.FirstName} {person3.LastName}");

        PrintObjectCategory("person3", person3.GetType());

​

        Console.WriteLine();

        var person4 = new Person4();

        person4.FirstName = "Ryan";

        person4.LastName = "Fiorini";

        Console.WriteLine($"person4: {person4.FirstName} {person4.LastName}");

        ChangeFirstName4(person4);

        Console.WriteLine($"person4: {person4.FirstName} {person4.LastName}");

        PrintObjectCategory("person4", person4.GetType());

​

    }

    public static void ChangeFirstName(Person person) {

        person.FirstName = "Valerie";

        Console.WriteLine($"person in method: {person.FirstName} {person.LastName}");

    }

​

    public static void ChangeFirstName2(Person2 person2) {

        // Init-only property or indexer 'Person2.FirstName' can only be assigned in an object initializer, or on 'this' or 'base' in an instance constructor or an 'init' accessor.

        //person2.FirstName = "Valerie";

        Console.WriteLine($"person2 in method: {person2.FirstName} {person2.LastName}");

    }

​

    public static void ChangeFirstName3(Person3 person3) {

        person3.FirstName = "Valerie";

        Console.WriteLine($"person3 in method: {person3.FirstName} {person3.LastName}");

    }

​

    public static void ChangeFirstName4(Person4 person4) {

        person4.FirstName = "Valerie";

        Console.WriteLine($"person4 in method: {person4.FirstName} {person4.LastName}");

    }

    private static void PrintObjectCategory(string name, Type spaceObject)

    {

        //Console.ForegroundColor = ConsoleColor.White;

        var objectTypeDescription = spaceObject

                .IsValueType

                ? "Value"

                : "Reference";

​

        Console.WriteLine($"{name} is a {objectTypeDescription} type");

    }   

}

​

​

public record struct Person(string FirstName, string LastName);

​

public record Person2(string FirstName, string LastName);

​

public record struct Person3()

{

    public string FirstName {get; set;} = default;

    public string LastName {get; set;} = default;

}

​

​

public record Person4()

{

    public string FirstName {get; set;} = default;

    public string LastName {get; set;} = default;

}

​

​

​