private MapElementCollection _mySymbols;

        public MapElementCollection MySymbols
        {
            get { return _mySymbols; }
			set { if (_mySymbols != value) { _mySymbols = value; OnPropertyChanged("MySymbols"); } }
		}

		public void mapLayer_Imported(object sender, Infragistics.Silverlight.Map.MapLayerImportEventArgs e)
        {
            if (e.Action == MapLayerImportAction.End)
            {
                for (int i = 0; i < 5; i++)
                {
                    SymbolElement s = new SymbolElement()
                    {
                        Value = i,
                        Name = "mapTracker",
                        SymbolOrigin = MyMapProjection.ProjectToMap(new Point(i * 10, i * 10)),
                        SymbolType = MapSymbolType.Bubble,
                        SymbolSize = 10 + i * 3,
                        Caption = "Element No." + i.ToString(),
                    };
                    MySymbols.Add(s); // Elements are in MySymbols but I cannot see them on the map
                    //((MapView)View).xamMap.Layers[0].Elements.Add(s); ? this is working!
                }
            }
        }