test device logger, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
           
            string[] arr2= {"channelaaa","chanellbbbb","channelcccc","chandddd","eeee","ffff","ggg","lll","kkk"};
            string config ="12,0,NONE,8;0;13,6,8,-ph,7;34,7,m3/h,clo,89,12;7,dev,0;0;0;1;1";
            string[] arrcf= config.Split(';');
            List<string> list = new List<string>();
            for(int i=0; i<arrcf.Length; i++)
            {
             string cha =arrcf[i];
                if(cha != "0")
                {
                    list.Add(arr2[i]);
                }
              
            }
            string[] arr = list.ToArray();
            string message = String.Join(",", arr);
            //$01 the end
             Console.WriteLine("Message:{0}", message);
            
            //$02 start
            string data="12.000;7.8;6;7.99;67;99";
            string[] arrdata=data.Split(';');
            string[] arrcf2 = message.Split(',');
            List<string> list2 = new List<string>();
            for(int j=0; j<arrdata.Length;j++)
            {
                list2.Add(arrcf2[j]+ ":" +arrdata[j]);
            }
             string[] arrkq = list2.ToArray();
            string message2 = String.Join(",", arrkq);
            Console.WriteLine("Message:{0}", message2);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,11 sec, cpu time: 0,09 sec, average memory usage: 12 Mb, average nr of threads: 3