GooglePlayCheck.cs

public bool IsPlayServicesAvailable ()
{
    int resultCode = GoogleApiAvailability.Instance.IsGooglePlayServicesAvailable (this);

    if (resultCode != ConnectionResult.Success)

    {

        if (GoogleApiAvailability.Instance.IsUserResolvableError(resultCode))

        {

          var dialog = GooglePlayServicesUtil.GetErrorDialog(resultCode,

                    this,

                    ConnectionFailureResolutionRequest);

            if (dialog != null)

            {

                var errorDialog = new ErrorDialogFragment { Dialog = dialog };

                errorDialog.Show(SupportFragmentManager, "Google Services Updates");

                return false;

            }
        }

        else

        {

            //error

        }

        return false;

    }

    else

    {

        Settings.Current.PushNotificationsEnabled = true;

        return true;

    }

}