将数组中指定数量的元素移动数组后面

        static void Main()        {            int[] array = { 1, 2, 3, 4, 5, 6, 7 };            MoveNumberArrayToEnd(array, 3);        }        static void MoveNumberArrayToEnd<T>(IList<T> arrayList, int num)        {            if (arrayList.Count < = 0 || arrayList.Count < num)            {                throw new RankException();            }            var query = (from number in arrayList                         orderby number descending                         select number).Take(arrayList.Count - num).Concat(arrayList.Take(num));            query.ToList().ForEach(q => Console.WriteLine("{0}", q));        }