using System.Linq;

using static System.Console;

public class Program

{

    public static void Main()

    {   

        const int upperLen = 2, lowerLen = 3;

        const char separator = ',';

        var array = new int[upperLen,lowerLen] { { 1, 2, 3 }, { 4, 5, 6 } };

        var output = string.Join(separator, array.Cast<int>());     

        WriteLine("Parsed:");

        WriteLine(output);

        WriteLine(new string('*', 15));

        var parsed = output.Split(separator);

        var input = new int[upperLen,lowerLen];

        for (var upper = 0; upper < upperLen; upper++)

            for(var lower = 0; lower < lowerLen; lower++)

            {

                var current = int.Parse(parsed[(upper * lowerLen) + lower]);

                input[upper, lower] = current;

                Write($"{current},");

            }

    }

}