private HashSet<GeoFence> FindGeoPointsFence( GeoPoint geoPoint )
{
HashSet<GeoFence> pointFences = new HashSet<GeoFence>();
foreach( GeoFence geoFence in fencesToCallback.Keys )
if( IsPointInFence( geoPoint, geoFence ) )
pointFences.Add( geoFence );
return pointFences;
}