如何在没有互联网的情况下通过编程连接到Wifi Android (Xamarin)

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

WifiManager wifiManager = (WifiManager)GetSystemService(Context.WifiService);
if (!wifiManager.IsWifiEnabled)
{
    wifiManager.SetWifiEnabled(true);
}

wifiManager.StartScan();
IList<ScanResult> scanResults = wifiManager.ScanResults;

WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.Ssid = "\"Wifi_SSID\"";
wifiConfig.PreSharedKey = "\"Wifi_Password\"";
int networkId = wifiManager.AddNetwork(wifiConfig);
wifiManager.EnableNetwork(networkId, true);

[BroadcastReceiver(Enabled = true)]
[IntentFilter(new[] { WifiManager.NetworkStateChangedAction })]
public class WifiReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {
        NetworkInfo networkInfo = intent.GetParcelableExtra(WifiManager.ExtraNetworkInfo) as NetworkInfo;
        if (networkInfo != null && networkInfo.DetailedState == NetworkInfo.DetailedState.Connected)
        {
            // Wifi已连接
        }
    }
}