Exercise: Virtual method and override

1. In the Car class add a new virtual method name it RoofType.
2. In the Main class Override the RoofType show message box : "Sunroofs".
3. In the Weekend class Override the RoofType show message box : "Convertible".
4. In the TestClass class call the RoofType for the first two cars declarations.
5. Build and test.

The Car class should look like :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Northwind.Exercises.MoreOnClass
{
    class Car
    {
        public string carName;
        public int carYear;
        public int CarKM;
        public string carType;
        static int CarCounter=0;
        public readonly int Id;

        public Car()
        {
            CarCounter++;
            Id = CarCounter;
            carName = "No name given";
            carYear = 0;
            CarKM = 0;
            carType = "No type given";
        }
        public void CarInfo() => MessageBox.Show("My number"+ this.Id + " " + this.carType + " car is " + this.carYear + " " + this.carName + "\n" + " I drove it for " + this.CarKM + " KM");
        public virtual void RoofType()
        {

        }
    }
} 

The Main class should look like :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Northwind.Exercises.MoreOnClass
{
    class Main : Car
    {
        public Main()
        {
            carType = "Main";
        }
        public void DriveFast()
        {
            MessageBox.Show("Whoop I am fast");
        }
        public override void RoofType()
        {
            MessageBox.Show("Sunroofs");
        }
    }
} 

The Weekend class should look like :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Northwind.Exercises.MoreOnClass
{
    class Weekend : Car
    {
        public Weekend()
        {
            carType = "Weekend";
        }
        public void DriveInStyle()
        {
            MessageBox.Show("I am cruising on the highway");
        }
        public override void RoofType()
        {
            MessageBox.Show("Convertible");
        }
    }
} 

The TestClass class should look like :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Northwind.Exercises.MoreOnClass
{
    class TestClass
    {
        public void Run()
        {
            var mainCar = new Main {carName = "BMW X6",carYear = 2015,CarKM = 20000};
            var weekendCar = new Weekend {carName = "Ford mustang",carYear = 1965,CarKM = 160000};
            var funCar = new Car();

            mainCar.CarInfo();
            mainCar.DriveFast();
            mainCar.RoofType();
            weekendCar.CarInfo();
            weekendCar.DriveInStyle();
            weekendCar.RoofType();
            funCar.CarInfo();
        }
    }
} 

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