프로그래머스 C# 두 개 뽑아서 더하기(OrderBy, Distinct())

using System;
using System.Collections.Generic;
using System.Linq;

public class Solution {
    public int[] solution(int[] numbers) {
        List<int> list = new List<int>();
        
        for(int i=0;i<numbers.Length;i++)
        {
            for(int j=0;j<numbers.Length;j++)
            {
                if(i != j)
                {
                    list.Add(numbers[i]+numbers[j]);
                }
            }
        }
        
        int[] answer = new int[list.ToArray().Length];
        answer = list.Distinct().OrderBy(x => x).ToArray();

        return answer;
    }
}