How do I check if the location is mappolygon in the Silverlight Bing Maps control?

polygon.Locations.Contains(new Location(this.Site.Latitude, this.Site.Longitude, this.Site.Altitude));

static bool PointInPolygon(LocationCollection polyPoints, Location point)
{

 if (polyPoints.Length <3)
 {
 return false;
 }
 
 bool inside = false;
 Location p1, p2;

 //iterate each side of the polygon
 Location oldPoint = polyPoints[polyPoints.Count-1]; 

 foreach(Location newPoint in polyPoints)
 {
 //order points so p1.lat <= p2.lat;
 if (newPoint.Latitude> oldPoint. Latitude)
 {
 p1 = oldPoint;
 p2 = newPoint;
 }
 else
 {
 p1 = newPoint;
 p2 = oldPoint;
 }

 //test if the line is crossed and if so invert the inside flag.
 if ((newPoint.Latitude  && (point.Longitude-p1.Longitude) * (p2.Latitude-p1.Latitude)
 <(p2.Longitude-p1.Longitude) * (point.Latitude-p1.Latitude))
 {
 inside = !inside;
 }

 oldPoint = newPoint;
 }

 return inside;
}

 if (PointInPolygon(polygon.Locations, new Location(this.Site.Latitude, this.Site.Longitude, this.Site.Altitude)))
{
 //do something 
}< /pre> 

I have a MapPolygon, which covers a certain area on the Silverlight Bing Maps control,
I want to know whether a specific location is located in this MapPolygon.

I tried the following code and it does not return the result I want because it only checks whether the test position is one of the vertices of the MapPolygon, and does not check whether this position is contained in this MapPolygon.

polygon.Locations.Contains(new Location(this.Site.Latitude, this.Site.Longitude, this.Site.Altitude));

Is it also possible to determine whether two MapPolygons cross each other?

polygon.Locations is a list of points that define polygons.

You must create a method to find whether your points are in Within the polygon.

Use something like this (do not test if compiled):

static bool PointInPolygon(LocationCollection polyPoints, Location point)
 {

 if (polyPoints.Length <3)
 {
 return false;
 }

 bool inside = false;
 Location p1, p2;

 //iterate each side of the polygon
 Location oldPoint = polyPoints[polyPoints.Count-1];

 foreach(Location newPoint in polyPoints)
 {
 //order points so p1.lat <= p2.lat;
 if (newPoint.Latitude> oldPoint.Latitude)
 {
 p1 = oldPoint;
 p2 = newPoint;
 }
 else
 {
 p1 = newPoint;
 p2 = oldPoint;
 }

 //test if the line is crossed and if so invert the inside flag.
 if ((newPoint.Latitude  && (point.Longitude-p1.Longitude) * (p2.Latitude-p1.Latitude)
 <(p2.Longitude-p1.Longitude) * (point.Latitude -p1.Latitude))
 {
 inside = !inside;
 }

 oldPoint = newPoint;
 }

 return inside;
}

and call it:

if (PointInPolygon(polygon.Locations, new Location(this.Site.Latitude , this.Site.Longitude, this.Site.Altitude)))
{
 //do something 
}