private void listComps_SelectedIndexChanged(object sender, EventArgs e)
 {
     if (listComps.SelectedIndex != -1)
     {
         var c = new Forms.Composition(idComp[listComps.SelectedIndex]);
         c.Show();
         listComps.ClearSelected();
     }
 }
        private void listPerf_SelectedIndexChanged(object sender, EventArgs e)
        {
            int id = 0;

            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if ((string)dt.Rows[i][0] == (string)listPerf.SelectedItem)
                {
                    id = (int)dt.Rows[i][1];
                }
            }
            if (listPerf.SelectedIndex != -1)
            {
                var c = new Forms.Composition(id);
                c.Show();
                listPerf.ClearSelected();
            }
        }