public virtual void TestIteratorThrowsOnConcurrentModification()
{
object[] elements = { "foo", "bar" };
var queue = NewQueue(elements);
var iterator = queue.Iterator();
Iterator4Assert.AssertNext("foo", iterator);
queue.Add("baz");
Assert.AreEqual("foo", iterator.Current, "accessing current element should be harmless"
);
Assert.Expect(typeof(InvalidOperationException), new _ICodeBlock_31(iterator));
}