private void TabControl1_MouseClick(object sender, MouseEventArgs e) { OrdersList.Items.Clear(); OrdersList.Refresh(); foreach (Order order in kitchen.GetOrders()) { var item = new ListViewItem(new string[4] { order.GetId().ToString(), kitchen.CheckOrder(order).ToString(), order.GetDishes().Count().ToString(), order.GetPrice().ToString() }); OrdersList.Items.Add(item); } ReadyOrdersList.Items.Clear(); ReadyOrdersList.Refresh(); foreach (Order order in kitchen.GetReadyOrders()) { var item = new ListViewItem(new string[2] { order.GetId().ToString(), order.GetPrice().ToString() }); ReadyOrdersList.Items.Add(item); } }