how to invert this (string bindata ="110000")

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            BitWiseComplement("11000");
            BitWiseComplement("00111111111111");
            BitWiseComplement("11000000000000");
            BitWiseComplement("11111111100000");
            BitWiseComplement("11111100001111");
        }

        static void BitWiseComplement(string firstBinaryNumber)
        {
            int result = Convert.ToInt32(firstBinaryNumber, 2);
            Console.WriteLine("{0,5}\t{1}", result, firstBinaryNumber);
            string complementedBinaryNumber = Convert.ToString(~result, 2);
            complementedBinaryNumber = complementedBinaryNumber.Remove(0, complementedBinaryNumber.Length - firstBinaryNumber.Length);
            Console.WriteLine("{0,5}\t{1}\n", Convert.ToInt32(complementedBinaryNumber, 2), complementedBinaryNumber);
        }
    }
}

   24   11000
    7   00111

 4095   00111111111111
12288   11000000000000

12288   11000000000000
 4095   00111111111111

16352   11111111100000
   31   00000000011111

16143   11111100001111
  240   00000011110000

string binData = "110000";
string invertedData = binData.Replace('0','*').Replace('1','0').Replace('*','1');

string binData = "110000";
string invertedData = new string(binData.Select(ch => ch == '0' ? '1' : '0').ToArray());