leetcode561

public class Solution {
    public int ArrayPairSum(int[] nums) {
        var list = nums.OrderBy(x => x).ToList();
            var sum = ;
            for (int i = ; i < list.Count; i += )
            {
                sum += list[i];
            }
            return sum;
    }
}

https://leetcode.com/problems/array-partition-i/#/description