private void AddZoo_Clicked(object sender, RoutedEventArgs e)
        {
            ZooModel zooModel = new ZooModel();

            zooModel.Location = textZoo.Text;

            try
            {
                DbConnectionManager.AddZoo(zooModel);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                textZoo.Text = "";
                ShowZooList();
            }
        }