static void Main()
        {
            Publisher pub = new Publisher();
            SendViaMobile svm = new SendViaMobile();
            SendViaEmail svem = new SendViaEmail();

            svm.Subscribe(pub);
            svem.Subscribe(pub);

            //pub.publishMsg += svm.sendSMS;
            //pub.publishMsg += svem.sendEmail;

            pub.PublishMsg("Far Cry 4 avalible");
            Console.WriteLine("\n\n");

            svm.Unsubscribe(pub);
            pub.PublishMsg("Far Cry 4 avalible");
        }