using System;

public class Program

{

    public static void Main()

    {

        Vehicle car = new Car { YearOfMake = "2021", NumberOfWheels = 4 };

        if (car is Vehicle vehicle) 

        {

            Console.WriteLine($"Found a vehicle with year {vehicle.YearOfMake}");

        }

        Console.WriteLine("Finished");

    }   

}

​

public class Vehicle

{

    public string YearOfMake { get; set; }

}

​

public class Car : Vehicle

{

    public int NumberOfWheels { get; set; }

}

​