ArcGIS API for Silverlight 中根据坐标点在地图上打标记

public void AddMarkergraphics()
{
      ESRI.ArcGIS.Client.Projection.WebMercator mercator = new ESRI.ArcGIS.Client.Projection.WebMercator();
      Graphicslayer graphicslayer = myMap.Layers["MyGraphicslayer"] as Graphicslayer;
      Graphic graphic = new Graphic()
      {
           Geometry = mercator.FromGeographic(new MapPoint(115.257113,33.0696150000001)),Symbol = LayoutRoot.Resources["DefaultMarkerSymbol"] as Symbol
      };
     graphicslayer.Graphics.Add(graphic);
 }

这个主要是FromGeographic()方法，传入的是一个4326的坐标系。