值类型和引用类型

using System;

struct Point
{
    public int X { get; set; }
    public int Y { get; set; }

    public Point(int x, int y)
    {
        X = x;
        Y = y;
    }

    public override string ToString()
    {
        return $"Point(X: {X}, Y: {Y})";
    }
}

class Person
{
    public string Name { get; set; }
    public int Age { get; set; }

    public Person(string name, int age)
    {
        Name = name;
        Age = age;
    }

    public override string ToString()
    {
        return $"Person(Name: {Name}, Age: {Age})";
    }
}
class Program
{
    static void Main(string[] args)
    {
        Point p = new Point(10, 20);
        PrintPoint(p);
        Console.WriteLine($"Point coordinates: X = {p.X}, Y = {p.Y}");
        Person person = new Person("John Doe", 30);
        PrintPerson(person);
        Console.WriteLine($"Person details: Name = {person.Name}, Age = {person.Age}");
    }
    static void PrintPoint(Point point)
    {
        point.X = 1000;
        point.Y = 2000;
        Console.WriteLine($"Point coordinates: X = {point.X}, Y = {point.Y}");
    }

    static void PrintPerson(Person person)
    {
        person.Name = "Joey Yu";
        person.Age = 40;
        Console.WriteLine($"Person details: Name = {person.Name}, Age = {person.Age}");
    }
}