如何从android CellSignalStrengthLte.Rsrp获取Xamarin C#

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

using Android.Content;
using Android.Telephony;
using Android.Telephony.CellInfo;
using System.Collections.Generic;

public class SignalStrengthHelper
{
    public static int GetLteRsrp(Context context)
    {
        var telephonyManager = (TelephonyManager)context.GetSystemService(Context.TelephonyService);
        if (telephonyManager != null)
        {
            var cellInfoList = telephonyManager.AllCellInfo;
            foreach (var cellInfo in cellInfoList)
            {
                if (cellInfo is CellInfoLte cellInfoLte)
                {
                    var cellSignalStrengthLte = cellInfoLte.CellSignalStrength;
                    if (cellSignalStrengthLte != null)
                    {
                        return cellSignalStrengthLte.Rsrp;
                    }
                }
            }
        }
        return -1; // 表示未能获取到RSRP值
    }
}

int rsrp = SignalStrengthHelper.GetLteRsrp(this);
if (rsrp != -1)
{
    // 成功获取到RSRP值
    Log.Debug("SignalStrength", $"RSRP: {rsrp}");
}
else
{
    // 未能获取到RSRP值
    Log.Debug("SignalStrength", "Failed to get RSRP");
}