private void FormLoaded(object sender, EventArgs e) { toolStrip.Enabled = true; // it needs for correct work of Control.CanProcessMnemonic method toolStrip.Visible = true; // _result &= !(toolStrip.ProcessDialogCharTest('F')); toolStrip.DisplayedItems.Add("&First item"); toolStrip.DisplayedItems.Add("&Second item"); toolStrip.DisplayedItems.Add("Third item"); toolStrip.Visible = true; // it needs for correct work of Control.CanProcessMnemonic method _result &= toolStrip.ProcessDialogCharTest('F'); _result &= toolStrip.ProcessDialogCharTest('S'); _result &= !(toolStrip.ProcessDialogCharTest('T')); Application.Exit(); }