private void AdManageGifts_OnMouseEnter(object sender, MouseEventArgs e)
        {
            var button = (Button)sender;

            if (GiftManager.ListAllGifts().Count == 0)
            {
                button.IsEnabled  = false;
                button.Background = Brushes.Crimson;
                button.ToolTip    = "No gifts are added yet";
                Thread.Sleep(50);
            }

            e.Handled = true;
        }
 public ListGifts()
 {
     this.InitializeComponent();
     this.dgUsers.ItemsSource = GiftManager.ListAllGifts();
 }