BasicGeoposition basicGeopoint = new BasicGeoposition() { Latitude = latitude, Longitude = longitude };
Geopoint geopoint = new Geopoint(basicGeopoint);
MapIcon mapIcon = new MapIcon();
mapIcon.Image = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/marker_icon.png"));
mapIcon.Location = geopoint;
mapIcon.Title = title;
mapIcon.NormalizedAnchorPoint = new Point(0.5, 1.0);
mapIcon.ZIndex = 0;
Map.MapElements.Add(mapIcon);