kiln-dried black locust?

Does black locust's rot-resistance diminish after kiln-drying? My complete amateurish guess is that using it while still green (fenceposts, hand-milled lumber for small workshed) would retain its rot-resistance. I also heard that it's so dense, it can be hard on a mill, so hand-milling it might be necessary (plus, I'm guessing working with green using handtools is going to be easier than working with kiln-dried BL with those same handtools).

Am I out in left field here? Thanks!

Can't answer your question directly because I've never seen locust used any other way than green or air dried. I have seen fences and fence posts that have lasted decades in contact with the ground that were put up either green or air dried.  What are you doing that would require kiln drying it?  You will definitely be able to work the wood green easier than if air or kiln dried.  That goes for about any wood.