private void btnICarnivore_Click(object sender, System.EventArgs e) {
     lstDino.Items.Clear();
     TRex chomper = new TRex ("Chomper", 14);
     Allosaurus ally = new Allosaurus ("Ally", 12);
     if (chomper.CanIEatU (ally)){
        lstDino.Items.Add (chomper.Name + " the " +
        chomper.GetType().ToString());
     lstDino.Items.Add ("has eaten");
     lstDino.Items.Add (ally.Name + " the " +
        ally.GetType().ToString());
     lstDino.Items.Add ("for dinner.");
     }
  }