C# 获取数组排序后的下标

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] src = new int[] { 2, 1, 0, 4, 1, 3, 3, -1, -1 };
            List<int> idxArr = new List<int>();

            for (int i = 0; i < src.Length; i++)
            {
                int index = 0;
                int val = src[index];
                while (idxArr.Contains(index))
                {
                    index++;
                    val = src[index];
                }

                for (int j = 0; j < src.Length; j++)
                {
                    if (idxArr.Contains(j))
                    {
                        continue;
                    }

                    if (src[j] < val)
                    {
                        index = j;
                        val = src[j];
                    }
                }

                idxArr.Add(index);
            }

            foreach (int idx in idxArr)
            {
                Console.Write(src[idx] + " ");
            }
            Console.WriteLine();
            foreach(int idx in idxArr)
            {
                Console.Write(idx + " ");
            }
            Console.WriteLine();

            Console.ReadKey();
        }
    }
}