C# once and zeros

using System;
using System.Text;

class Program
{
    static void Main()
    {
        long number = 4095;//65535;// int.Parse(Console.ReadLine());
        //Console.WriteLine(GetIntBinaryString (number));
        string bin = GetIntBinaryString(number).ToString();
        char[] numBin = new char[16];
        numBin= bin.ToCharArray();//Convert.ToString(number, 2).PadLeft(16, '0').ToCharArray();//
        string[] zeroes = new string[]{
            "###",
            "#.#",
            "#.#",
            "#.#",
            "###"};
        string[] once = new string[] {
            ".#.",
            "##.",
            ".#.",
            ".#.",
            "###" };
        int lineCounter = 0;
        StringBuilder line = new StringBuilder();
        while (lineCounter < zeroes.Length)
        {
            for (int i = 0; i < numBin.Length; i++)
            {
                if (numBin[i] == '1')
                {
                    line.Append(once[lineCounter]);
                    if (i < numBin.Length - 1)
                    {
                        line.Append(".");
                    }
                }
                else if (numBin[i] == '0')
                {
                    line.Append(zeroes[lineCounter]);
                    if (i < numBin.Length - 1)
                    {
                        line.Append(".");
                    }
                }
            }
            Console.WriteLine(line);
            line.Clear();
            lineCounter++;
        }
    }
    static string GetIntBinaryString(long n)
    {
        char[] b = new char[16];
        int pos = 15;
        int i = 0;

        while (i < 16)
        {
            if ((n & (1 << i)) != 0)
            {
                b[pos] = '1';
            }
            else
            {
                b[pos] = '0';
            }
            pos--;
            i++;
        }
        return new string(b);
    }
}