private bool FindConstituentToMove(District fromDistrict, District toDistrict, Constituent.Party party, out MoveManager.Move move) { //candidates for moving are any district in the "from" district, with the requested party, that hasn't already been moved this turn var moveCandidates = fromDistrict.ConstituentsQuery.Where(c => c.party == party && !moveManager.OriginalDistricts.ContainsKey(c)); //intersect the move candidates with the moves the rules actually allow us to make HashSet <Constituent> validMoves = moveManager.GetValidMovesForDistrict(toDistrict); validMoves.IntersectWith(moveCandidates); //if there are any moves available, choose one at random if (validMoves.Count > 0) { Constituent chosenMove = Utils.ChooseRandom(moveCandidates.ToArray()); move = new MoveManager.Move(chosenMove, chosenMove.District, toDistrict); return(true); } else { //we didn't find anything, so just populate it with defaults move = new MoveManager.Move(null, null, null); return(false); } }