Windows phone 7 图钉不在bing地图中

当我手动提供值（纬度和经度）时，图钉工具找不到位置

这是我的密码：

double dbllat = 13.060407;

double dbllong = 80.249562;

Pushpin mypin = new Pushpin();

watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);

            watcher.MovementThreshold = 40;

            watcher.Start();

            watcher.Position.Location.Latitude = dbllat;

            watcher.Position.Location.Longitude = dbllong;

            mypin .Location.Latitude = dbllat;

            mypin .Location.Longitude = dbllong;

            //CredentialsProvider cp=

            map1.Center = new GeoCoordinate(mypin.Location.Latitude, mypin.Location.Longitude);
            map1.SetView(mypin .Location, 5.0);
            push.Tag = "Location";
            push.Content = "i'm here";
            map1.Children.Add(mypin);
            watcher.Stop();

我可能做错了什么？

如果这是你的错误：

无法路由一个或多个航路点，因为它们离任何道路都太远。

试一试

而不是

mypin .Location.Latitude = dbllat;
mypin .Location.Longitude = dbllong;

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啊，你需要做什么？查找当前位置或显示固定位置（13.060407,80.249562）？地理坐标记录器是异步的。你需要听我说。

mypin .Location.Latitude = dbllat;
mypin .Location.Longitude = dbllong;