public async Task RemovePlayerFromLobby(string lobbyId, byte index) { var settings = new JsonSerializerSettings() { TypeNameHandling = TypeNameHandling.All }; // logic var(playerList, removedPlayer) = LobbyHandler.RemovePlayerFromLobby(lobbyId, index); // notify removed player await Clients.Group(Game.UniquePlayerGroup(lobbyId, index)).SendAsync("LeaveLobby"); //await Groups.RemoveFromGroupAsync(Context.ConnectionId, lobbyId); await Clients.Group(lobbyId).SendAsync("ReceiveMessage", removedPlayer.InGameName, "I left the Lobby"); await Clients.Group(lobbyId).SendAsync("PlayerListChanged", JsonConvert.SerializeObject(playerList, Formatting.Indented, settings)); }