using System;

​

public class Vehicle

{

    public void PrintType()

    {

        Console.WriteLine("This is a vehicle");

    }

}

​

public class Car : Vehicle

{

    public void PrintModel(string m)

    {

        Console.WriteLine("The model of the car is " + m);

    }

}

​

public class UpcastingExample

{

    public static void Display(Vehicle v)

    {

        v.PrintType();

    }

​

    public static void Main(string[] args)

    {

        Car c = new Car();

        Display(c);

        c.PrintModel("Honda");

    }

}