private void addAnimalBtn_Click(object sender, EventArgs e)
{
int size = Convert.ToInt32(sizeCb.Text.Substring(0, 1));
if (train.AddAnimalToWagon(nameTb.Text, (CircusTreinLogica.Size)size, diet))
{
UpdateLists();
}
else
{
MessageBox.Show("A new wagon is created!");
UpdateLists();
}
}