private async void FindAddressButton_Click(object sender, RoutedEventArgs e)
        {
            _locatorTask = new ESRI.ArcGIS.Runtime.Tasks.Locator
                (new Uri("http://tasks.arcgisonline.com/ArcGIS/rest/services/Locators/TA_Streets_US_10/GeocodeServer", UriKind.Absolute));

            AddressToLocationsParameter addressParams = new AddressToLocationsParameter()
            {
                OutSpatialReference = MyMap.SpatialReference
            };

            IDictionary<string, string> address = addressParams.Address;

            if (!string.IsNullOrEmpty(InputAddress.Text))
                address.Add("Street", InputAddress.Text);
            if (!string.IsNullOrEmpty(City.Text))
                address.Add("City", City.Text);
            if (!string.IsNullOrEmpty(State.Text))
                address.Add("State", State.Text);
            if (!string.IsNullOrEmpty(Zip.Text))
                address.Add("ZIP", Zip.Text);

            try
            {
                AddressToLocationsResult result = await _locatorTask.AddressToLocationsAsync(addressParams);

                if (_candidateGraphicsLayer.Graphics != null && _candidateGraphicsLayer.Graphics.Count > 0)
                    _candidateGraphicsLayer.Graphics.Clear();

                if (result != null)
                {
                    foreach (AddressCandidate candidate in result.AddressCandidates)
                    {
                        if (candidate.Score >= 80)
                        {
                            Graphic graphic = new Graphic()
                            {
                                Geometry = candidate.Location
                            };

                            graphic.Attributes.Add("Address", candidate.Address);

                            string latlon = String.Format("{0}, {1}", candidate.Location.X, candidate.Location.Y);
                            graphic.Attributes.Add("LatLon", latlon);

                            if (candidate.Location.SpatialReference == null)
                            {
                                candidate.Location.SpatialReference = SpatialReference.Wgs84;
                            }

                            _candidateGraphicsLayer.Graphics.Add(graphic);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                return;
            }
        }
        private async void GetDirections_Click(object sender, RoutedEventArgs e)
        {
            //Reset
            DirectionsStackPanel.Children.Clear();
            var _stops = new List<Graphic>();
            var _locator = new ESRI.ArcGIS.Runtime.Tasks.Locator(new Uri("http://tasks.arcgisonline.com/ArcGIS/rest/services/Locators/TA_Address_NA/GeocodeServer"));
            var routeLayer = MyMap.Layers["MyRouteGraphicsLayer"] as GraphicsLayer;
            routeLayer.Graphics.Clear();
            try
            {
                //Geocode from address
                var fromLocation = await _locator.AddressToLocationsAsync(ParseAddress(FromTextBox.Text));
                if (fromLocation.AddressCandidates != null && fromLocation.AddressCandidates.Count > 0)
                {
                    AddressCandidate address = fromLocation.AddressCandidates.FirstOrDefault();
                    Graphic graphicLocation = new Graphic() { Geometry = address.Location, Symbol = LayoutRoot.Resources["FromSymbol"] as ISymbol };
                    graphicLocation.Attributes["address"] = address.Address;
                    graphicLocation.Attributes["score"] = address.Score;
                    _stops.Add(graphicLocation);
                    routeLayer.Graphics.Add(graphicLocation);
                }
                //Geocode to address
                var toLocation = await _locator.AddressToLocationsAsync(ParseAddress(ToTextBox.Text));
                if (toLocation.AddressCandidates != null && toLocation.AddressCandidates.Count > 0)
                {
                    AddressCandidate address = toLocation.AddressCandidates.FirstOrDefault();
                    Graphic graphicLocation = new Graphic() { Geometry = address.Location, Symbol = LayoutRoot.Resources["ToSymbol"] as ISymbol };
                    graphicLocation.Attributes["address"] = address.Address;
                    graphicLocation.Attributes["score"] = address.Score;
                    _stops.Add(graphicLocation);
                    routeLayer.Graphics.Add(graphicLocation);
                }
                //Get route between from and to
                var _routeParams = new RouteParameter()
                {
                    ReturnRoutes = false,
                    ReturnDirections = true,
                    DirectionsLengthUnits = MapUnit.Miles,
                    Stops = new FeatureStops(_stops),
                    UseTimeWindows = false
                };

                var _routeTask = new RouteTask(new Uri("http://tasks.arcgisonline.com/ArcGIS/rest/services/NetworkAnalysis/ESRI_Route_NA/NAServer/Route"));

                _routeParams.OutSpatialReference = MyMap.SpatialReference;
                var routeTaskResult = await _routeTask.SolveAsync(_routeParams);
                _directionsFeatureSet = routeTaskResult.Directions.FirstOrDefault();

                routeLayer.Graphics.Add(new Graphic() { Geometry = _directionsFeatureSet.MergedGeometry, Symbol = LayoutRoot.Resources["RouteSymbol"] as ISymbol });
                TotalDistanceTextBlock.Text = string.Format("Total Distance: {0}", FormatDistance(_directionsFeatureSet.RouteSummary.TotalLength, "miles"));
                TotalTimeTextBlock.Text = string.Format("Total Time: {0}", FormatTime(_directionsFeatureSet.RouteSummary.TotalTime));
                TitleTextBlock.Text = _directionsFeatureSet.RouteName;

                int i = 1;
                foreach (Graphic graphic in _directionsFeatureSet.Graphics)
                {
                    System.Text.StringBuilder text = new System.Text.StringBuilder();
                    text.AppendFormat("{0}. {1}", i, graphic.Attributes["text"]);
                    if (i > 1 && i < _directionsFeatureSet.Graphics.Count)
                    {
                        string distance = FormatDistance(Convert.ToDouble(graphic.Attributes["length"]), "miles");
                        string time = null;
                        if (graphic.Attributes.ContainsKey("time"))
                        {
                            time = FormatTime(Convert.ToDouble(graphic.Attributes["time"]));
                        }
                        if (!string.IsNullOrEmpty(distance) || !string.IsNullOrEmpty(time))
                            text.Append(" (");
                        text.Append(distance);
                        if (!string.IsNullOrEmpty(distance) && !string.IsNullOrEmpty(time))
                            text.Append(", ");
                        text.Append(time);
                        if (!string.IsNullOrEmpty(distance) || !string.IsNullOrEmpty(time))
                            text.Append(")");
                    }
                    TextBlock textBlock = new TextBlock() { Text = text.ToString(), Tag = graphic, Margin = new Thickness(4) };
                    textBlock.Tapped += TextBlock_Tapped;
                    DirectionsStackPanel.Children.Add(textBlock);
                    i++;
                }
                MyMap.ZoomTo(_directionsFeatureSet.RouteSummary.Extent.Expand(0.6));
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
            }
        }