public async Task SendMessage(string to, string text) { var userName = HttpContext.User.Identity.Name; var message = new Message() { ConversationId = to, Text = text, Date = DateTime.Now }; var conv = await _chatManager.AddMessageAsync(userName, to, message); if (conv == null) { return; } foreach (var attendee in conv.Attendees) { var user = await _userManager.FindByIdAsync(attendee.UserId); if (user != null && user.UserName != userName) { _hub.Clients.Group(user.UserName).messageReceived(new MessageViewModel() { ConversationId = to, Date = message.Date, From = HttpContext.User.Identity.Name, Text = text }); } } }