public static singlon setObj()
{
if (obj == null)
{
obj = new singlon();
}
return(obj);
}
static void Main(string[] args)
{
singlon s1 = singlon.setObj();
s1.Message("this is s1");
singlon s2 = singlon.setObj();
s1.Message("this is s2");
singlon s3 = singlon.setObj();
s1.Message("this is s3");
singlon s4 = singlon.setObj();
s1.Message("this is s4");
Console.WriteLine("no of objects = {0}", singlon.objCount);
Console.ReadKey();
//Decorator
//CarDecoration c = new CarDecoration();
//c.EngineType();
//c = new PetrolEngine();
//c.EngineType();
//c = new DieselENgine();
//c.EngineType();
//Observer
INotify e1 = new EventNotification("event abc");
INotify s1 = new SpecialOffer("special offer");
subject s = new subject();
s.Register(e1);
s.Register(s1);
s.annouce();
//Builder
//OldRobotBuilder oldStyleRobot = new OldRobotBuilder();
//RobotEngineer robootEngineer = new RobotEngineer(oldStyleRobot);
//robootEngineer.makeRobot();
//Robot firstRobot = robootEngineer.getRobot();
//Console.WriteLine("robot head : {0} ", firstRobot.getRobotHead());
//Console.WriteLine("robot body : {0} ", firstRobot.getRobotTorso());
//Console.WriteLine("robot Arms : {0} ", firstRobot.getRobotArms());
//Console.WriteLine("robot Legs : {0} ", firstRobot.getRobotLegs());
//Adopter
//EnemyTank tank = new EnemyTank();
//EnemyRobot robot = new EnemyRobot();
//IEnemyAttacker robotAdopter = new EnemyRobotAdapter(robot);
//Console.WriteLine("the robot");
//robot.smashWithHands();
//robot.moveForward();
//robot.reachToHuman("john");
//structure
//Animal tomy = new Dog();
//Animal sparrow = new Bird();
//Console.WriteLine("Dog : {0}", tomy.tryToFly());
//Console.WriteLine("Bird : {0}", sparrow.tryToFly());
//tomy.setFlyingAbility(new ItFlys());
//Console.WriteLine("Dog : {0}", tomy.tryToFly());
Console.ReadKey();
}