Dictionary<Feature,string> fts=new Dictionary<Feature,string>();
      
         m_objLayer.BeginAccess(LayerBeginAccessConstants.miAccessReadWrite);                if (fts[trans.id] != null)
                {                  下面我该怎么写

                    fts[trans.id].Point.Set(trans.log, trans.lat);
                    fea = fts[trans.id];

                }
                else
                {
                fea = m_objLayer.AddFeature(ft, Type.Missing);
                fts.Add(trans.id, fea);        
                }            m_objLayer.EndAccess(LayerBeginAccessConstants.miAccessRead);
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