protected override void Invoke(Button sender)
 {
     if (!PokeData.AllMissing())
     {
         sender.Text      = "Better catch 'em all!";
         sender.IsEnabled = false;
     }
 }
 protected override void Invoke(Button sender)
 {
     if (!PokeData.AllCaught())
     {
         sender.Text      = "You got 'em all!";
         sender.IsEnabled = false;
     }
 }