protected override void OnSelectedValueChanged(EventArgs e)
        {
            base.OnSelectedValueChanged(e);
            try
            { foreach (Binding bnd in this.DataBindings) { bnd.BindingManagerBase.EndCurrentEdit(); } }
            catch
            { foreach (Binding bnd in this.DataBindings) { bnd.BindingManagerBase.EndCurrentEdit(); } }
        }