protected CoreSymbolManager GetSymbolManager()
 {
     if (m_symbolManager == null)
     {
         m_symbolManager = new CoreSymbolManager(m_coreMap, m_mapVectorLayer);
     }
     return(m_symbolManager);
 }
 protected override CoreSpatialElementManager GetSpatialElementManager()
 {
     if (m_symbolManager == null)
     {
         m_symbolManager = new CoreSymbolManager(m_coreMap, m_mapVectorLayer);
     }
     return(m_symbolManager);
 }