/// <summary>
        /// Event handler for GUI exit button
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnEnd_Click(object sender, EventArgs e)
        {
            Form form = new Goodbye(txtPercent.Text, txtAttempts.Text);

            form.StartPosition = FormStartPosition.CenterParent;
            form.Show();
        }
        /// <summary>
        /// Overridden OnClosing event to provide a goodbye dialog
        /// </summary>
        /// <param name="e"></param>
        protected override void OnClosing(CancelEventArgs e)
        {
            e.Cancel = true;
            Form form = new Goodbye(txtPercent.Text, txtAttempts.Text);

            form.StartPosition = FormStartPosition.CenterParent;
            form.Show();
        }