public void IList_NonGeneric_IndexOf_EachValueNoDuplicates(int count)
{
// Assumes no duplicate elements contained in the list returned by NonGenericIListFactory
IList list = NonGenericIListFactory(count);
Assert.All(Enumerable.Range(0, count), index =>
{
Assert.Equal(index, list.IndexOf(list[index]));
});
}