ArcGISWindowsPhoneSDK.Samples.LocationToAddress.MyMap_MapGesture C# (CSharp) Méthode

        private void MyMap_MapGesture(object sender, Map.MapGestureEventArgs e)
        {
            if (e.Gesture == GestureType.Tap && MyMap.Extent != null)
            {
                Locator locatorTask = new Locator("http://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer");
                locatorTask.LocationToAddressCompleted += LocatorTask_LocationToAddressCompleted;
                locatorTask.Failed += LocatorTask_Failed;

                // Tolerance (distance) specified in meters
                double tolerance = 30;
                locatorTask.LocationToAddressAsync(e.MapPoint, tolerance);

                Graphic graphic = new Graphic()
                {
                    Symbol = DefaultMarkerSymbol,
                    Geometry = e.MapPoint
                };
                GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
                graphicsLayer.Graphics.Clear();
                graphicsLayer.Graphics.Add(graphic);
            }
        }