public void Layout()
{
ToolStripDropDown drop_down = new ToolStripDropDown();
drop_down.Items.Add(new ToolStripVariableSizeItem());
drop_down.PerformLayout();
// We want to be sure the DropDown is using the size provided
// by GetPreferredSize, not DefaultSize, and since the extra padding/margin
// can change by some few pixels, we do a light check
Assert.AreEqual(true, drop_down.Size.Width >= 100, "A1");
Assert.AreEqual(true, drop_down.Size.Height >= 100, "A2");
}