public class Solution    {        public int LargestPerimeter(int[] A)        {            var list = A.OrderByDescending(x => x).ToList();            var length = list.Count;            if (length < 3)            {                return 0;            }            for (int i = 0; i <= length - 3; i++)            {                //Console.WriteLine(i);                var list2 = list.Skip(i).Take(3).ToList();                var a = list2[0];                var b = list2[1];                var c = list2[2];                if (a < b + c && b < a + c && c < a + b)                {                    return a + b + c;                }            }            return 0;        }    }