[Test] // 1.3.12
public void CopyStack()
{
var input = new LinkedListStack <string>();
input.Push("three");
input.Push("two");
input.Push("one");
Assert.AreEqual(new string[] { "one", "two", "three" }, input.ToArray());
var output = CopyStack(input);
Assert.AreEqual(output.ToArray(), input.ToArray());
}