Heroku 发送带有 SingalR-websocket 错误的 ping

Question

Hello I uploaded a server asp.net core 3.1 https://networkscanner.herokuapp.com/ ping checker to Heroku and when i push the button to check i get Heroku error

重要的是要注意当服务器在我的本地主机上时他很好

2020-04-11T12:06:01.928201+00:00 app[web.1]: ---> System.PlatformNotSupportedException: The system's ping utility could not be found.
2020-04-11T12:06:01.928202+00:00 app[web.1]: at System.Net.NetworkInformation.Ping.GetPingProcess(IPAddress address, Byte[] buffer, PingOptions options)
2020-04-11T12:06:01.928202+00:00 app[web.1]: at System.Net.NetworkInformation.Ping.SendWithPingUtility(IPAddress address, Byte[] buffer, Int32 timeout, PingOptions options)

这是我的代码

    async void SendPing()
    {
        Ping pingSender = new Ping();
        int timeout = 10000;
        string d = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        byte[] buffer = Encoding.ASCII.GetBytes(d);
        PingOptions options = new PingOptions(64, true);
        PingReply reply = pingSender.Send(this.numbers.Address, timeout, buffer, options);
        if (reply.Status == IPStatus.Success)
        {
            endPoint.ip = reply.Address.ToString();
            endPoint.isUP = true;
            endPoint.ms = reply.RoundtripTime.ToString();
            result.status = 200;
            result.message = "OK";
            result.endPoint = endPoint;
            await Clients.All.SendAsync("Send", result);
        }
        else
        {
            endPoint.ip = reply.Address.ToString();
            result.message = reply.Status.ToString();
            endPoint.isUP = false;
            result.status = 400;
            result.endPoint = endPoint;
            await Clients.All.SendAsync("Send", result);
        }
    }
    return result;