private void MenuItem_SaveAs_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();

            saveFileDialog.Filter = "Level data (*.xml)|*.xml";
            if (saveFileDialog.ShowDialog() == true)
            {
                // Saved to the selected path
                _path = saveFileDialog.FileName;
                LevelXML.SaveXML(_path, _layerTiles, _level);
            }

            _Level_Menu.Visibility = Visibility.Collapsed;
        }
        private void MenuItem_Save_Click(object sender, RoutedEventArgs e)
        {
            // If attempting to save but the current level is new, use Save As
            if (_path == "")
            {
                MenuItem_SaveAs_Click(null, null);
            }
            else // otherwise overwrite the file
            {
                LevelXML.SaveXML(_path, _layerTiles, _level);
            }

            _Level_Menu.Visibility = Visibility.Collapsed;
        }