int[] arr = new int[11]{1,4,2,8,-9,5,6,3,5,7,-8};
            var v = (from i in arr orderby Math.Abs(i) select i).Reverse().Take(10);
            int[] r = v.ToArray();//r是结果

------解决方案--------------------
data[]是字符串数组
data.Select(s => Convert.ToInt32(s)) 先将数组中每个元素转换为整数
.OrderByDescending(x => Math.Abs(x)) 按最大值倒序排序
.Take(10); 取集合中前10个