mono_w32socket_convert_error: no translation into winsock error for (64) "Machine is not on the network"

Question

I need to control my APP's network go through Mobile/WiFi

So I follow this post 40216514

But when I tried to turn on WiFi. And make wifi be my major network.

Then I tried to do some communication. Very high possiblity(90%) the APP crash.

How can I avoid it?

Thank you!

Here is my code.

public void SomeFunction() 
{ 
    await ForceWifiOverCellular();

    try
    {
        app_connection_request app_connection_request = new app_connection_request
        {
            url = "app_con_req",
            request = mode,
        };

        Settings.Log_Item_Scan += "91/n";
        // Serialize our concrete class into a JSON String
        var stringPayload = await Task.Run(() => JsonConvert.SerializeObject(app_connection_request));

        // Wrap our JSON inside a StringContent which then can be used by the HttpClient class
        var httpContent = new StringContent(stringPayload, Encoding.UTF8, "application/json");

        var myHttpClient = new HttpClient()
        {
            Timeout = TimeSpan.FromSeconds(15)
        };

        Settings.Log_Item_Scan += "92/n"; //Crash at here
        var resp = await myHttpClient.PostAsync(URL, httpContent);


        Settings.Log_Item_Scan += "93/n";
        if (resp.IsSuccessStatusCode)
        {

            Settings.Log_Item_Scan += "94/n";
            var json = await resp.Content.ReadAsStringAsync();
            Settings.Log_Item_Scan += "95/n";
            var result = JsonConvert.DeserializeObject<RS485_Info>(resp.Content.ReadAsStringAsync().Result); 
            {
                return 0;
            }
        }

        return -1; 
    }
    catch (Exception e)
    {

        Settings.Log_Item_Scan += "96/n";
        return -1;
    }
}
public async static Task<int> ForceWifiOverCellular()
{
    await WiFi_Control_Center.Set_WiFI_Enable(true); //This code is to turn on wifi

    await Task.Delay(TimeSpan.FromSeconds(2));
    ConnectivityManager connection_manager = (ConnectivityManager)_context.GetSystemService(Context.ConnectivityService);

    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.AddTransportType(TransportType.Wifi);

    var callback = new ConnectivityManager.NetworkCallback();
    connection_manager.RegisterNetworkCallback(request.Build(), new CustomNetworkAvailableCallBack());

    await Task.Delay(TimeSpan.FromSeconds(2));
    return 0;
}

public static async Task Set_WiFI_Enable(bool enabled)
{
    try
    {

    WifiManager Temp_WiFi = (WifiManager)Android.App.Application.Context.GetSystemService(Context.WifiService);
    Temp_WiFi.SetWifiEnabled(enabled);
    await Task.Delay(1000);
    }
    catch
    { 
    }
}

Here is some log

06-12 20:47:25.355 D/Mono (14255): Assembly System.Reflection.Primitives[0xad468660] added to domain RootDomain, ref_count=1 06-12 20:47:25.356 D/Mono (14255): AOT: image 'System.Reflection.Primitives.dll.so' not found: dlopen failed: library "/data/app/com.mydeltasolar_1_0_1.app-uRHsm2P_-FnLPQC6AXJTDA==/lib/arm/libaot-System.Reflection.Primitives.dll.so" not found 06-12 20:47:25.356 D/Mono (14255): AOT: image '/Users/builder/jenkins/workspace/xamarin-android-d15-9/xamarin-android/external/mono/sdks/out/android-armeabi-v7a-release/lib/mono/aot-cache/arm/System.Reflection.Primitives.dll.so' not found: dlopen failed: library "/data/app/com.mydeltasolar_1_0_1.app-uRHsm2P_-FnLPQC6AXJTDA==/lib/arm/libaot-System.Reflection.Primitives.dll.so" not found 06-12 20:47:25.356 D/Mono (14255): Config attempting to parse: 'System.Reflection.Primitives.dll.config'. 06-12 20:47:25.356 D/Mono (14255): Config attempting to parse: '/Users/builder/jenkins/workspace/xamarin-android-d15-9/xamarin-android/external/mono/sdks/out/android-armeabi-v7a-release/etc/mono/assemblies/System.Reflection.Primitives/System.Reflection.Primitives.config'. 06-12 20:47:25.356 D/Mono (14255): Assembly Ref addref Newtonsoft.Json[0xed1995c0] -> System.Reflection.Primitives[0xad468660]: 2 06-12 20:47:25.357 D/Mono (14255): Assembly Ref addref System.Reflection.Primitives[0xad468660] -> mscorlib[0xed1991a0]: 91 Loaded assembly: System.Reflection.Primitives.dll [External] Xamarin.Android returned no custom HttpClientHandler. Defaulting to System.Net.Http.HttpClientHandler 06-12 20:47:25.502 I/mono-stdout(14255): Xamarin.Android returned no custom HttpClientHandler. Defaulting to System.Net.Http.HttpClientHandler 06-12 20:47:25.519 F/ (14255): mono_w32socket_convert_error: no translation into winsock error for (64) "Machine is not on the network" 06-12 20:47:25.534 D/ConnectivityManager(14255): setProcessDefaultNetwork CallingUid : 10532, CallingPid : 14255 06-12 20:47:25.534 D/ConnectivityManager_URSP(14255): hong blacklisted - false 06-12 20:47:26.090 F/libc (14255): Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 14362 (Thread Pool Wor), pid 14255 (solar_1_0_1.app) 06-12 20:47:27.252 D/InputMethodManager(14255): HSIFW - flag : 0 Pid : 14255