using System;

internal class Program

{

    public class Car

    {

        public string manufacturer;

        public string model;

        public int maxSpeed;

​

        public Car()

        {

        }

​

        public Car(String model, String manufacturer, int maxSpeed)

        {

            this.model = model;

            this.manufacturer = manufacturer;

            this.maxSpeed = maxSpeed;

        }

​

        public void PrintDetail()

        {

            Console.Write($"\n{model}, {manufacturer}, {maxSpeed} km/h");

        }

​

    }

​

    static void Main(string[] args)

    {

        Car i10 = new Car("i10", "Hyundai", 156);

        i10.PrintDetail();

​

        i10.maxSpeed = -100;

        i10.PrintDetail();

        // Nhan xet

        // Ket luan: can phai dong goi cac thuoc tinh

    }

}