private void RemoveAnimalFromZoo_Clicked(object sender, RoutedEventArgs e)
        {
            //string query = @"delete from ZooAnimal where AnimalID = @AnimalID";
            if (listBoxZoo.SelectedItem != null && listBoxAnimal.SelectedItem != null)
            {
                try
                {
                    DbConnectionManager.RemoveAnimalFromZoo(listBoxZoo, listBoxAnimal);
                    //SqlCommand removeAnimalCommand = new SqlCommand(query, sqlConnection);

                    //using (removeAnimalCommand)
                    //{
                    //    removeAnimalCommand.Parameters.AddWithValue("@ZooID", listBoxZoo.SelectedValue);
                    //    removeAnimalCommand.Parameters.AddWithValue("@AnimalID", listBoxAnimal.SelectedValue);
                    //    removeAnimalCommand.Connection.Open();
                    //    removeAnimalCommand.ExecuteScalar();
                    //    removeAnimalCommand.Connection.Close();
                    //}
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
                finally
                {
                    ShowAnimalsList();
                }
            }
            else
            {
                MessageBox.Show("Select a zoo and animal first");
            }
        }