void MoveToNextPage()
 {
     if (CurrentPage.CanMoveToNextPage() && this.CanMoveToNextPage)
     {
         if (this.CurrentPageIndex < this.Pages.Count - 1)
         {
             this.CurrentPage = this.Pages[this.CurrentPageIndex + 1];
         }
         else
         {
             this.OnRequestClose();
         }
     }
 }