Keerigan

and myWatcher.Start();

I got it to work. I needed to have

myWatcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High); 
myWatcher.MovementThreshold = 20; 

I always get stuck on this. I always get those errors, and the one time that I didn't, I was unable to properly get my location.

I live in London Canada, and when I got to msrmaps.com, only the states are green. Does this mean that the terra service will not be able to tell me where I am in Canada? If not, is there another service that will work in Canada?

@spier: Don't know how I missed yours, but that worked.   But now my latitude and longitude are not changing help? 

private void button1_Click(object sender, RoutedEventArgs e)
        {
            GeoCoordinateWatcher myWatcher = new GeoCoordinateWatcher();

            GeoCoordinate myPosition = myWatcher.Position.Location;

            double latitude = 0.0;
            double longitude = 0.0;

            if (!myPosition.IsUnknown)
            {
                latitude = myPosition.Latitude;
                longitude = myPosition.Longitude;
            }
            textBlock2.Text = latitude + ":" + longitude;

            myTerraService.TerraServiceSoapClient client = new myTerraService.TerraServiceSoapClient();

            client.ConvertLonLatPtToNearestPlaceCompleted += new EventHandler<myTerraService.ConvertLonLatPtToNearestPlaceCompletedEventArgs>(client_ConvertLonLatPtToNearestPlaceCompleted);

            client.ConvertLonLatPtToNearestPlaceAsync(new myTerraService.LonLatPt { Lat = latitude, Lon = longitude });

        }

        void client_ConvertLonLatPtToNearestPlaceCompleted(object sender, myTerraService.ConvertLonLatPtToNearestPlaceCompletedEventArgs e)
        {
            textBlock1.Text = e.Result;
            // throw new NotImplementedException();
        }