public SpatialReference SpatialReference {get;}

public Task<bool> ZoomToPoint(double x, double y, ArcGIS.Core.Geometry.SpatialReference spatialReference)
{
  //Get the active map view.
  var mapView = MapView.Active;
  if (mapView == null)
    return Task.FromResult(false);

  return QueuedTask.Run(() =>
  {
    //Note: Run within QueuedTask
    //Create a point
    var pt = MapPointBuilderEx.CreateMapPoint(x, y, spatialReference);
    //Buffer it - for purpose of zoom
    var poly = GeometryEngine.Instance.Buffer(pt, buffer_size);

    //do we need to project the buffer polygon?
    if (!MapView.Active.Map.SpatialReference.IsEqual(poly.SpatialReference))
    {
      //project the polygon
      poly = GeometryEngine.Instance.Project(poly, MapView.Active.Map.SpatialReference);
    }

    //Zoom - add in a delay for animation effect
    return mapView.ZoomTo(poly, new TimeSpan(0, 0, 0, 3));
  });
}