public GraphicsLayer(string id, string name)
: base(id, name)
{
this.Polygons.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Polygons_CollectionChanged);
this.Lines.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Lines_CollectionChanged);
this.Markers.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Markers_CollectionChanged);
}