private void underlineToolStripButton2_Click(object sender, EventArgs e)
{
MDIChild mc = this.ActiveMdiChild as MDIChild;
if (mc == null)
return;
mc.ApplyStyleToSelected("TextDecoration", underlineToolStripButton2.Checked ? "Underline" : "None");
SetProperties(mc);
SetMDIChildFocus(mc);
}