Practicing `static` Keyword

In this problem, you need to:

Create a new private field called totalCars of type double which tracks the total number of Car objects created;
Create a getter method called getTotalCars which simply returns the number of objects;
Make sure the value of the totalCars field is incremented every time a new Car object is created.

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using System;

class Car
{
    int modelYear;
    double mileage;
    string brandName;

    public Car(string brandName, int modelYear, double mileage)
    {
        this.brandName = brandName;
        this.modelYear = modelYear;
        this.mileage = mileage;

        // Write code below this line

        // Write code above this line 
    }

    // Write code below this line

    // Write code above this line
}

class ConsoleApp
{

    static void Main()
    {
        Console.WriteLine(Car.getTotalCars());

        Car car1 = new Car("Toyota", 2022, 25.5);
        Car car2 = new Car("Honda", 2020, 30.2);
        Car car3 = new Car("Ford", 2021, 28.8);

        Console.WriteLine(Car.getTotalCars());
    }
}

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Seção 4. Capítulo 6