Treeview DoubleClick Problem

You cannot doubleclick on the +/- of the treenodes. The nodes expand and collapse on a single click. I tried suppressing the doubleclick but as SAKryukov says, its not possible to do that. Its because the event BeforeExpand gets handled before the event MouseDoubleClick, otherwise we could have cancelled the expansion of nodes by setting the e.Cancel = true in the BeforeExpand event.
Here is how I tried:

private bool isDoubleClick = false;

void treeView1_MouseDoubleClick(object sender, MouseEventArgs e)
{
 isDoubleClick = true;
}

//But this event is called before MouseDoubleClick so isDoubleClick will be false.
void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
 if (isDoubleClick == true)
  {
   e.Cancel = true;
  }
}