Binary to Hex String Conversion

binary2hex.cs

        public static string BinaryToHex(byte[] data)
        {
            if (data == null)
            {
                return null;
            }

            var array = new char[checked(data.Length*2)];
            for (var i = 0; i < data.Length; i++)
            {
                var b = data[i];
                array[2*i] = NibbleToHex((byte) (b >> 4));
                array[2*i + 1] = NibbleToHex((byte) (b & 15));
            }
            return new string(array);
        }

        private static char NibbleToHex(byte nibble)
        {
            /* 
             * f(x) 
             *  where
             *    x = 0..9   -> x
             *    x = 10..15 -> x - 10 + 65   //65 = ASCII CODE for uppercased 'A'
             */

            return (char) ((nibble < 10) ? (nibble + 48) : (nibble - 10 + 65));
        }