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C# abstract classes inheritance
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace A_work_2
{
public abstract class Vehicle
{
    public string vehicleName;
    public abstract void Display();

}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace A_work_2
{
public class Vehicle4Wheels : Vehicle
{
    public override void Display()
    {
        Console.WriteLine("Car with four wheels.");
    }
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace A_work_2
{
public class SportCar : Vehicle4Wheels {
    public override void Display()
    {
        Console.WriteLine("Sport version of the car.");
    }
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace A_work_2
{
public class Rally : SportCar
{
private double motorPower = 408;
private double carWeight = 2380;
private double carAcceleration = 4.7;
private double highestSpeed = 250;

public double SpecificPower()
{
    double specificPower = motorPower / carWeight;
    return specificPower;
}

public override void Display()
{

   Console.WriteLine("The acceleration is: {0}.nThe highest speed is {1} km/h.", carAcceleration, highestSpeed);
   Console.WriteLine("Specific power is {0}", SpecificPower());


}
}
}

private double carWeight;

Vehicle sportCar = new SportCar();
sportCar.Display();

Vehicle rally = new Rally();
rally.Display();