/// <summary>
        /// Save button click event
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        private void ContentDialog_PrimaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
        {
            newTrack          = new Track(DateTime.Now.Date, txtTitle.Text, txtDesc.Text);
            newTrack.keywords = txtKeywords.Text;

            if (cboSubjects.SelectedIndex >= 0)
            {
                newTrack.subject = (Subject)cboSubjects.SelectedItem;
            }

            usrClicked = cdClicked.Save; // Set the usrClicked value to save
        }
 /// <summary>
 /// Cancel button click event
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="args"></param>
 private void ContentDialog_SecondaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
 {
     this.Hide();
     usrClicked = cdClicked.Cancel; // Set the usrClicked value to cancel
 }