How to display custom label in Xamarin.Android Range Slider

public class MainActivity : AppCompatActivity

    {

  SfRangeSlider rangeSlider;

  List<Items> customCollection;

  protected override void OnCreate(Bundle savedInstanceState)

        {

            base.OnCreate(savedInstanceState);

            customCollection = new List<Items>();

            customCollection.Add(new Items() { Label = "AM", Value = 5 });

            customCollection.Add(new Items() { Label = "PM", Value = 16 });

            rangeSlider = new SfRangeSlider(this);

            rangeSlider.ShowCustomLabel = true;

            rangeSlider.ShowValueLabel = true;

            rangeSlider.SnapsTo = SnapsTo.StepValues;

            rangeSlider.TickFrequency = 1;

            rangeSlider.Minimum = 5;

            rangeSlider.Maximum = 16;

            rangeSlider.RangeStart = 5;

            rangeSlider.RangeEnd = 16;

            rangeSlider.RangeStartChanged += RangeSlider_RangeStartChanged;

            rangeSlider.RangeEndChanged += RangeSlider_RangeEndChanged;

            rangeSlider.Orientation = Com.Syncfusion.Sfrangeslider.Orientation.Horizontal;

            rangeSlider.ShowRange = true;

            rangeSlider.TickPlacement = TickPlacement.Inline;

            rangeSlider.CustomLabels = customCollection;

            SetContentView(rangeSlider);

        }