Swap characters in a string

Just for fun, using xor-swap, avoiding StringBuilder:string input = "AXBYCZ";char[] output = input.ToCharArray();for (int lo = 0, hi = 1; hi < output.Length; lo += 2, hi += 2){ output[lo] = (char)(output[lo] ^ output[hi]); output[hi] = (char)(output[lo] ^ output[hi]); ...