Illustrates the use of static members

   

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/
/*
  Example6_1.cs illustrates the use of static members
*/


// declare the Car class
class Car
{

  // declare a static field,
  // numberOfCars stores the number of Car objects
  private static int numberOfCars = 0;

  // define the constructor
  public Car()
  {
    System.Console.WriteLine("Creating a Car object");
    numberOfCars++;  // increment numberOfCars
  }

  // define the destructor
  ~Car()
  {
    System.Console.WriteLine("Destroying a Car object");
    numberOfCars--;  // decrement numberOfCars
  }

  // define a static method that returns numberOfCars
  public static int GetNumberOfCars()
  {
    return numberOfCars;
  }

}


public class Example6_1
{

  public static void Main()
  {

    // display numberOfCars
    System.Console.WriteLine("Car.GetNumberOfCars() = " +
      Car.GetNumberOfCars());

    // create a Car object
    Car myCar = new Car();
    System.Console.WriteLine("Car.GetNumberOfCars() = " +
      Car.GetNumberOfCars());

    // create another Car object
    Car myCar2 = new Car();
    System.Console.WriteLine("Car.GetNumberOfCars() = " +
      Car.GetNumberOfCars());

  }

}