public void Clone()
{
StringStack clone = (StringStack)_stack.Clone();
Assert.AreEqual(_stack.Count, clone.Count);
int count = _stack.Count;
for (int i = 0; i < count; i++)
{
CloneableType x = _stack.Pop(), y = clone.Pop();
Assert.AreEqual(x, y);
Assert.AreSame(x, y);
}
}