private void comboBoxUsage_SelectedIndexChanged(object sender, EventArgs e)
{
this.textBoxIdentifier.Enabled = (this.comboBoxUsage.SelectedIndex > 0);
switch(this.comboBoxUsage.SelectedIndex)
{
case 0:
this.textBoxIdentifier.Text = "";
this.m_rule.Identification = null;
this.m_rule.Description = null;
break;
case 1:
this.m_rule.Description = "*";
break;
case 2:
this.m_rule.Description = null;
break;
}
this.UpdateBehavior();
}