public async Task SendMessageAsync(AggregateId toUserId, AggregateId pairId, string message, int messageNo) { await _hubContext.Clients.User(toUserId.ToString()).SendAsync("messageArrived", new PairMessageReceivedResponse() { FromUserId = _correlationContext.CurrentUser.UserId.Value.ToGuid(), Message = message, PairId = pairId.ToGuid(), ToUserId = toUserId.ToGuid(), PairMessageNo = messageNo }); }