public void AddRange (ToolStripItem[] toolStripItems)
{
if (toolStripItems == null)
throw new ArgumentNullException ("toolStripItems");
if (this.IsReadOnly)
throw new NotSupportedException ("This collection is read-only");
this.owner.SuspendLayout ();
foreach (ToolStripItem tsi in toolStripItems)
this.Add (tsi);
this.owner.ResumeLayout ();
}