private void idMaker_Available(IdMaker idMaker, bool available) { Invoke(new Action(delegate { if (available == false) { var msgBox = new MehdiMessageBox("\nThis Id is Already Created!", "Attention", MehdiMessageBox.Type.Error); //msgBox.MessageColor = Color.Red; //msgBox.TitleColor = Color.Red; msgBox.ShowDialog(); } })); }