无法在聊天（套接字）中获取超过4096字节的响应

Question

我正在使用C＃中的ClientWebSocket进行聊天。我可以接收消息，但可以接收2个4096字节的数据包。如何一举获得全部？

代码

 public async void ConnectToServerAsync()
{
ClientWebSocket client = new ClientWebSocket();

    await client.ConnectAsync(new Uri("ws://local123:ws"), CancellationToken.None);
            UpdateClientState();
            await Task.Factory.StartNew(async () =>
            {
                Refresh();

                    WebSocketReceiveResult result;

                    var buf = new byte[8192];

                    var message = new ArraySegment<byte>(buf, 0, buf.Length);

                        result = await client.ReceiveAsync(message, CancellationToken.None);
                        //var messageBytes = message.Skip(message.Offset).Take(result.Count).ToArray();
                        string serialisedMessae = Encoding.UTF8.GetString(buf,0,result.Count);

                        try
                        {
                            var msg = JsonConvert.DeserializeObject<List<ChatModel>>(serialisedMessae);
                            Debug.WriteLine(msg.Count);
                            if (Chatlist.Count != msg.Count)
                            {
                                Chatlist.Clear();
                                foreach (var chatmsg in msg)
                                {
                                    var details = new ChatModel()
                                    {
                                        Message = chatmsg.Message,
                                        MessageFrom = chatmsg.MessageFrom,
                                        MessageTo = chatmsg.MessageTo,
                                        RoomId = chatmsg.RoomId,

                                    };
                                    Chatlist.Insert(0, details);
                                }
                            }
                            else
                            {

                            }

                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine($"Invalide message format. {ex.Message}");
                        }


                }

            }, CancellationToken.None, TaskCreationOptions.LongRunning, TaskScheduler.Default);
            void UpdateClientState()
            {
                OnPropertyChanged(nameof(IsConnected));
                sendMessageCommand.ChangeCanExecute();
                Console.WriteLine($"Websocket state {client.State}");
            }
        }

当我反序列化响应时。我可以在一个数据包中得到一个部分json，然后在另一个数据包中得到休息。如何一次获取整个json？