MyGame.Mediator.fireEvent C# (CSharp) Method

        public void fireEvent(MyEvent ev,params Object[] param)
        {
            if (hash[(int)ev] == null) return;
            List<IEvent> list = (List<IEvent>)hash[(int)ev];
            Event eve = new Event(ev,param);
            foreach (IEvent ie in list)
            {
                ie.addEvent(eve);
            }
        }

        protected override void Update(GameTime gameTime)
        {
            KeyboardState keyState = Keyboard.GetState();

            //if (keyState.IsKeyDown(Keys.Escape))
            //    Exit();

            foreach (Event ev in events)
            {
                switch (ev.EventId)
                {
                case (int)MyEvent.G_Exit: if (paused)
                    {
                        Exit();
                    }
                    break;

                case (int)MyEvent.G_StartGame:
                    if (paused)
                    {
                        initializeGame2();
                    }
                    break;

                case (int)MyEvent.G_NextLevel:
                    paused   = true;
                    canPause = false;
                    break;

                case (int)MyEvent.G_NextLevel_END_OF_MUSIC:
                    if (currentLevel == Constants.NUM_OF_LEVELS)
                    {
                        initializeCreditsScreen();
                    }
                    else
                    {
                        paused   = false;
                        canPause = true;
                        currentLevel++;
                        monsters.Dispose();
                        initializeGame2();
                    }
                    break;

                case (int)MyEvent.G_StartLevel:
                    if (Components.Contains(levelScreen))
                    {
                        Components.Remove(levelScreen);
                        paused = false;
                    }
                    break;

                case (int)MyEvent.G_StartScreen:
                    paused = true;
                    initializeStartMenu();
                    break;

                case (int)MyEvent.G_CreditScreen: initializeCreditsScreen(); break;

                case (int)MyEvent.G_HelpScreen: initializeHelpScreen(); break;
                }
            }
            events.Clear();

            if (delayedAction.eventHappened(gameTime, keyState.IsKeyDown(Keys.RightAlt) &&
                                            keyState.IsKeyDown(Keys.Enter)))
            {
                graphics.ToggleFullScreen();
            }

            if ((keyState.IsKeyDown(Keys.Enter) || keyState.IsKeyDown(Keys.Escape)) && gameOver)
            {
                gameOver = false;
                mediator.fireEvent(MyEvent.G_StartScreen);
            }

            if (delayedAction2.eventHappened(gameTime, keyState, Keys.C))
            {
                if ((int)cameraMode == 2)
                {
                    cameraMode = CameraMode.thirdPerson;
                    ((ChaseCamera)camera).resetOffsets();
                }
                else
                {
                    cameraMode++;
                    ((ChaseCamera)camera).setOffsetsFor1stPerson();
                }
            }

            base.Update(gameTime);
        }