Boo.Lang.Runtime.RuntimeServices.MoveNext C# (CSharp) Method

        public static object MoveNext(IEnumerator enumerator)
        {
            if (enumerator == null)
                throw new ApplicationException(StringResources.CantUnpackNull);
            if (!enumerator.MoveNext())
                throw new ApplicationException(StringResources.UnpackListOfWrongSize);
            return enumerator.Current;
        }