Verified with SDK 10.0.4xx (mise): builds clean, solution test green
deterministically, pristine test flaky as designed (failed 2/3 runs).
net7.0 runtime is out of support and unavailable, so the exercise now
targets net10.0; MSTest bumped 2.1.1 -> 3.6.4 to silence the NU1903
transitive-dependency warning. .gitignore for bin/obj.
New in-theme classes: Buyers computes a shopping-list total, PriceList
stands for the pricing service (random surge, flaky test). One loop, one
lambda-able expression — the third example teaches the move with nothing
else in the way. Pristine repo + reference solution (extract lambda,
slide, extract method with Func<IceCream,int> parameter, pure-lambda
test) + storyboard in the established style. Mirrors the kata's C#
setup (net7.0, MSTest); needs a build check on a machine with the SDK.