swapping variables

What I wrote above wasn't ASM. It's pure C. I don't know C#, only C and C++, so I don't know whether C# has disabled such "careless" use of pointers. I wouldn't be surprised, though.

I know it wasn't ASM, but you pointed to ASM, and assuming all data is stored binary, you could xor it by ASM-coding no matter what. The results may be corrupted though (by not caring what you xor).

On your processor (Intel?).
There are others where you'd use 100% more time using XOR. But the idea is to save space, not time.

AMD.
And yeah, on my processor with my RAM.