Improve List<T>/ReadOnlyCollection<T> deep copy performance (#6010)
Improve List<T>/ReadOnlyCollection<T> deep copy performance (#6010)


yevhen/orleans,amccool/orleans,jason-bragg/orleans,hoopsomuah/orleans,amccool/orleans,yevhen/orleans,dotnet/orleans,amccool/orleans,hoopsomuah/orleans,ibondy/orleans,ReubenBond/orleans,veikkoeeva/orleans,galvesribeiro/orleans,dotnet/orleans,jthelin/orleans,waynemunro/orleans,ibondy/orleans,ElanHasson/orleans,galvesribeiro/orleans,benjaminpetit/orleans,ElanHasson/orleans,waynemunro/orleans