private void rdoStandardR_CheckedChanged(object sender, EventArgs e)
{
if (this.rdoStandardR.Checked)
{
this.pnlStandardOptionsR.BringToFront();
this.pnlRegexpOptionsR.SendToBack();
}
else
{
this.pnlRegexpOptionsR.BringToFront();
this.pnlStandardOptionsR.SendToBack();
}
}