using System;

using System.Text;

using System.Collections.Generic;

public class Program

{

    static List<int> FromDecimalToBinary(int num)

    {

        var result = new List<int>();

        int rem;

        while(num>0)

        {

            rem = num % 2;

            num = num / 2;

            result.Add(rem);

        }

        result.Reverse();

​

        return result;  

    }

    public static void Main()

    {

        Console.WriteLine(string.Join(",",FromDecimalToBinary(42)));

    }

}