Decode radio frequences

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//You are given an array of doubles (one line, space-separated). Your task is to convert the double values to their character //representations and insert them into a list like so:
//•   Example: 83.105
//•   Extract the left part of the number and convert it to its ASCII code representation: 83  S
//•   Extract the right part of the number and convert I to its ASCII code representation: 105  i
//•   Insert the left character at the position equal to the index of the double number in the original array.  Index of double: 0  insert S at index 0
//•   Insert the right character at the position equal to the index of the double number in the original array, counted in reverse: index //of the double: 0  insert “i” at index 0, counted in reverse (so, the end of the list)
//Repeat the aforementioned algorithm for each element of the double array, until you run out of elements. When you do, print the list //with no delimiter.
//If any of the parts of the double number are 0 (such as 86.0 or 0.97), ignore them and do not insert them anywhere.

namespace Decode_radio_frequences
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] frequences = Console.ReadLine().Split(' ').ToArray();
            List<char> result = new List<char>();

            for (int i = 0; i < frequences.Length; i++)
            {
                char left = TakeLeft(frequences[i]);
                char right = TakeRight(frequences[i]);
                if ((int)left != 0)
                {
                    result.Insert(i, left);
                }
                if ((int)right != 0)
                {
                    result.Insert(result.Count - i, right);
                }
            }
            Console.WriteLine(string.Join("", result));
        }
        static char TakeLeft(string left)
        {
            int[] leftRight = left.Split('.').Select(int.Parse).ToArray();
            int leftPart = leftRight[0];
            char leftChar = (char)leftPart;
            return leftChar;
        }
        static char TakeRight(string right)
        {
            int[] leftRight = right.Split('.').Select(int.Parse).ToArray();
            int rightPart = leftRight[1];
            char rightChar = (char)rightPart;
            return rightChar;
        }
    }
}