/// <summary>
        /// Display the help dialog
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void helpButton_Click(object sender, RibbonControlEventArgs e)
        {
            if (helpDialog == null || helpDialog.IsDisposed)
            {
                helpDialog = new HelpDialog();
            }

            helpDialog.Show();
            helpDialog.Activate();
        }
        /// <summary>
        /// Display the help dialog
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void helpButton_Click(object sender, RibbonControlEventArgs e)
        {
            if (helpDialog == null || helpDialog.IsDisposed)
            {
                helpDialog = new HelpDialog();
            }

            helpDialog.Show();
            helpDialog.Activate();
        }