class Service_Android : Java.Lang.Object, IService
    {
        Intent SyncIntent;
        User anUser;
        public void StartService()
        {
            ScheduleSyncService();
            //MainActivity test = new MainActivity();
            //test.ScheduleSyncService();
        }

        public void ScheduleSyncService()
        {

            if (!IsAlarmSet())
            {
                Calendar calendar = Calendar.GetInstance(Java.Util.TimeZone.Default);
                DateTime today = DateTime.Today;
                DateTime tomorrow = DateTime.Today.AddDays(1);
                TimeSpan ts = new TimeSpan(anUser.horaNotification, anUser.minutosNotification, 00);
                today = today.Date + ts;

                calendar.Set(today.Year, today.Month, today.Day, anUser.horaNotification, anUser.minutosNotification, 00);

                Calendar rightNow = Calendar.GetInstance(Java.Util.TimeZone.Default);

                var alarm = (AlarmManager)Forms.Context.GetSystemService(Context.AlarmService);
                var pendingServiceIntent = PendingIntent.GetService(Forms.Context, 0, SyncIntent, 0);
                //var test = SystemClock.ElapsedRealtime() + calendar.TimeInMillis;
                var trigeredTime = (long)today.ToUniversalTime().Subtract(
                            new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)
                            ).TotalMilliseconds;

                if (rightNow.TimeInMillis < trigeredTime)
                {
                    alarm.SetRepeating(AlarmType.RtcWakeup, trigeredTime, AlarmManager.IntervalDay, pendingServiceIntent);
                }
                else
                {
                    TimeSpan tsTmorrow = new TimeSpan(anUser.horaNotification, anUser.minutosNotification, 00);
                    tomorrow = tomorrow.Date + tsTmorrow;
                    var tomorrowMilis = (long)tomorrow.ToUniversalTime().Subtract(
                            new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)
                            ).TotalMilliseconds;
                    alarm.SetRepeating(AlarmType.RtcWakeup, tomorrowMilis, AlarmManager.IntervalDay, pendingServiceIntent);
                }

            }
            else
            {
                System.Console.WriteLine("La alarma ya esta configurada");
            }
        }

            public bool IsAlarmSet()
            {
//Exception thrown here!
                return PendingIntent.GetBroadcast(Forms.Context.ApplicationContext, 0, SyncIntent, PendingIntentFlags.NoCreate) != null;
            }

        }