public void AsArray()
{
var list = new List <int>();
var emptyArray = CollectionUtilities.EmptyArray <int>();
var listArray = CollectionUtilities.AsArray(list);
XAssert.AreSame(emptyArray, listArray);
list.Add(1);
list.Add(2);
list.Add(3);
listArray = CollectionUtilities.AsArray(list);
XAssert.IsTrue(Enumerable.SequenceEqual(list, listArray));
}