private void btn_click(object sender, EventArgs e) { Button btn = sender as Button; int index = Convert.ToInt32(btn.Name.ToString()); List <Machine> machines = new List <Machine>(); machines = GetMachines(); Detay dt = new Detay { Machine = machines[index] }; timerDbCheck.Enabled = false; timerDbCheck.Stop(); panelMain.Controls.Clear(); panelMain.Controls.Add(dt); dt.Show(); dt.Dock = DockStyle.Fill; dt.BringToFront(); }