private void CheckB_Click(object sender, EventArgs e) { CheckedLV.Items.Clear(); int hours; int minutes; string text = timeTB.Text; var arr = text.Split(':'); hours = int.Parse(arr[0]); minutes = int.Parse(arr[1]); var listHunger = zoo.CheckHunger(hours, minutes); foreach (Animal animal in listHunger) { CheckedLV.Items.Add(animal.GetName()); } }