public async Task RemoveParticipant(ISessionParticipant participant)
{
_participants.Remove(participant.GetPrimaryKey());
await Task.WhenAll(_participants.Select(
pair => pair.Value.OnParticipantLeave(participant.GetPrimaryKey())
));
}
public async Task AddParticipant(ISessionParticipant participant)
{
await Task.WhenAll(_participants.Select(
pair => pair.Value.OnParticipantJoin(participant.GetPrimaryKey())
));
_participants.Add(participant.GetPrimaryKey(), participant);
}