/// <summary>
        /// Respond to "Exit" Item Selection
        /// </summary>
        /// <param name="playerIndex"></param>
        protected override void OnCancel(PlayerIndex playerIndex)
        {
            HighScoreScreen.SaveHighscore();

            ScreenManager.Game.Exit();

            AudioManager.StopSound("MenuMusic_Loop");
        }
        /// <summary>
        /// Performs necessary update logic.
        /// </summary>
        /// <param name="gameTime">Game time information.</param>
        /// <param name="otherScreenHasFocus">Whether another screen has the focus.</param>
        /// <param name="coveredByOtherScreen">Whether this screen is covered by another.</param>
        public override void Update(GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen)
        {
            if (isExiting)
            {
                if (!HighScoreScreen.HighscoreSaved)
                {
                    HighScoreScreen.SaveHighscore();
                }
                else
                {
                    isExiting = false;
                    ScreenManager.Game.Exit();
                }
            }

            base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
        }