public class Solution {    public int ThirdMax(int[] nums) {        var third = 0;            var list = nums.Distinct().OrderByDescending(x => x).ToList();            if (list.Count == 0)            {                third = 0;            }            else if (list.Count >= 1 && list.Count <= 2)            {                third = list[0];            }            else            {                third = list[2];            }            return third;    }}