private void Initialize()
{
// Create a map with 'Imagery with Labels' basemap and an initial location
Map myMap = new Map(BasemapType.ImageryWithLabels, 34.056295, -117.195800, 14);
// Create graphics when MapView's viewpoint is initialized
MyMapView.ViewpointChanged += OnViewpointChanged;
// Assign the map to the MapView
MyMapView.Map = myMap;
}