c#
namespace DecToBin
{
    public class BinClass
    {

        int Dec;
        public int[] array = new int[8];
        public BinClass(int Decim)
        { Dec = Decim; }

        public void BinGet()
        {
            for (int a = 0; a < 8; a++)
            {
               array[a] = Dec % 2;
                Dec = Dec / 2;
            }
        }

        public void BinWrite()
        {
            for(int a=7; a<=0; a--)
            {
                Console.Write(array[a]);
                wspace(a);
            }
        }

        public void wspace(int x)
        {
            if (x % 4 == 0)
            {
                Console.Write(" ");
            }
        }

    }
}

c#
namespace DecToBin
{
    public class BinClass
    {

        int Dec;
        public int[] array = new int[8];
        public BinClass(int Decim)
        { Dec = Decim; }

        public void BinGet()
        {
            for (int a = 0; a < 8; a++)
            {
               array[a] = Dec % 2;
                Dec = Dec / 2;
            }
        }

        public void BinWrite()
        {
            for(int a=7; a<=0; a--)
            {
                Console.Write(array[a]);
                wspace(a);
            }
        }

        public void wspace(int x)
        {
            if (x % 4 == 0)
            {
                Console.Write(" ");
            }
        }

    }
}

c#
using DecToBin;
using System.Dynamic;

namespace Bin
{

    class Binary
    {
        static void text(string txt)
        {
            Console.WriteLine(txt + Environment.NewLine);
        }
        static void Main(string[] args)
        {
            int[] BinA=new int[8];
            text("Input Decimal Number");
            int dec=Convert.ToInt32(Console.ReadLine());
            DecToBin.BinClass Bin = new BinClass(dec);
            Bin.BinGet();
            Bin.BinWrite();

        }
    }
}

c#
using DecToBin;
using System.Dynamic;

namespace Bin
{

    class Binary
    {
        static void text(string txt)
        {
            Console.WriteLine(txt + Environment.NewLine);
        }
        static void Main(string[] args)
        {
            int[] BinA=new int[8];
            text("Input Decimal Number");
            int dec=Convert.ToInt32(Console.ReadLine());
            DecToBin.BinClass Bin = new BinClass(dec);
            Bin.BinGet();
            Bin.BinWrite();

        }
    }
}