private void Start()
        {
            if (SpritzState == SpritzState.Running)
            {
                SpritzState = SpritzState.Paused;
            }
            else if (SpritzState == SpritzState.Paused || SpritzState == SpritzState.Ready)
            {
                SpritzState = SpritzState.Running;
                DisplayNextWord();
            }
            else if (SpritzState == SpritzState.Finished)
            {
                SpritzState = SpritzState.Ready;
                ActiveIndex = 0;
                if (_spritzWords.Count > 0)
                {
                    DisplayWord(_spritzWords[0]);
                }
            }

            _goLeftCommand.RaiseCanExecuteChanged();
            _goToStartCommand.RaiseCanExecuteChanged();
            _goRightCommand.RaiseCanExecuteChanged();
        }
        private void Start()
        {
            if (SpritzState == SpritzState.Running)
            {
                SpritzState = SpritzState.Paused;
            }
            else if (SpritzState == SpritzState.Paused || SpritzState == SpritzState.Ready)
            {
                SpritzState = SpritzState.Running;
                DisplayNextWord();
            }
            else if (SpritzState == SpritzState.Finished)
            {
                SpritzState = SpritzState.Ready;
                ActiveIndex = 0;
                if (_spritzWords.Count > 0)
                    DisplayWord(_spritzWords[0]);
            }

            _goLeftCommand.RaiseCanExecuteChanged();
            _goToStartCommand.RaiseCanExecuteChanged();
            _goRightCommand.RaiseCanExecuteChanged();
        }