public void StartNextVoting()
{
AssertNotFinishedVoting();
_topics = _topics.Concat(_votingPair.GetWinners()).ToArray();
if (_topics.Count() == 1)
{
RaiseEvent(new VotingFinishedEvent(Id, _topics.Single()));
}
else
{
RaiseEvent(new VotingStartedEvent(Id, _topics.Skip(2).ToArray(), VotingPair.Create(_topics.Take(2).ToArray())));
}
}