Convert any decimal number into binary and then inverse it (Use of AND and NOT operators) :

static void Main(string[] args)
{
  Console.Write("Enter a number : ");
   byte b = (byte) Int32.Parse(Console.ReadLine());
 

   for (int t = 128; t > 0; t = t / 2)
   {
     //Convent into binary
      if ((b & t) != 0)
      {
        Console.Write("1 ");
      }
      else
      {
        Console.Write("0 ");
       }
              
    }
    Console.WriteLine();
           
    b = (byte) ~b;
           
    for(int t=128;t>0;t=t/2)
    {  
      //NOT operation
      if((b&t)!=0)
      {
        Console.Write("1 ");
      }
      else
      {
        Console.Write("0 ");
      }
    }
    Console.Read();
}

OUTPUT: