c# - Bings 地图中的路线

Question

我使用了文档并遵循了所有步骤，但是当我尝试实现代码时，我什么也看不到。

BingMapsDirectionsTask bingMapsDirectionsTask = new BingMapsDirectionsTask();

// You can specify a label and a geocoordinate for the end point.
GeoCoordinate spaceNeedleLocation = new GeoCoordinate(-33.3935,-070.6215);
LabeledMapLocation spaceNeedleLML = new LabeledMapLocation("camino las rosas,santiago,chile", spaceNeedleLocation);

// If you set the geocoordinate parameter to null, the label parameter is used as a search term.
// LabeledMapLocation spaceNeedleLML = new LabeledMapLocation("Space Needle", null);

bingMapsDirectionsTask.End = spaceNeedleLML;

// If bingMapsDirectionsTask.Start is not set, the user's current location is used as the start point.

bingMapsDirectionsTask.Show();