public void LastIndexOfTest()
{
var a = new[] { new EClass(1), new EClass(2) };
var l = new EventedList <EClass>(a);
l.Add(a[0]);
Assert.That(l.LastIndexOf(a[0]), Is.EqualTo(2));
Assert.That(l.LastIndexOf(a[0], 1, 2), Is.EqualTo(0));
}