private void radioPanel_CheckedChanged(object sender, EventArgs e)
{
this.labelFont.Text = this.CurrentFont.SerializeFontAttribute;
this.listBoxGradients.Items.Clear();
this.listBoxGradients.Items.AddRange(this.radioDockPanel.Checked ?
DockPaneStripGradients : AutoHideGradients);
this.listBoxGradients.SelectedIndex = 0;
}