private void LoadDeckButton_Click(object sender, RoutedEventArgs e)
        {
            Deck          deck          = DeserializeDeck();
            NewDeckWindow newDeckWindow = new NewDeckWindow(this, deck);

            newDeckWindow.ShowDialog();
        }
        private void NewDeckButton_Click(object sender, RoutedEventArgs e)
        {
            NewDeckWindow newDeckWindow = new NewDeckWindow(this);

            newDeckWindow.ShowDialog();
        }