public void ReversEnumerator()
{
int num = 50000;
var list = new SortSet <int, int>();
for (int i = 0; i < num; i++)
{
list.Add(i, i);
}
int n = 0;
var e = list.ReversEnumerator();
while (e.MoveNext())
{
var v = e.Current;
Assert.AreEqual(num - ++n, v);
}
}