private void RunToListOnAllCollectionTypes <T>(T[] items, Action <List <T> > validation)
{
validation(Enumerable.ToList(items));
validation(Enumerable.ToList(new List <T>(items)));
validation(new TestEnumerable <T>(items).ToList());
validation(new TestReadOnlyCollection <T>(items).ToList());
validation(new TestCollection <T>(items).ToList());
}
