How do I turn off the “Map Base” Layer using API ?

By Partha Sarkar

I want to switch
off the "Map Base" Layer using Map 3D API.

Here is the C# code snippet to switch off the "Map Base" Layer using Map 3D
managed API :

using (Transaction trans = transManager.StartTransaction())
{
  ObjectId managerId = DisplayManager.Create(proj).MapManagerId(proj, true);
  MapManager manager = trans.GetObject(managerId, OpenMode.ForRead) as MapManager;
 
  if (manager != null)
  {
    currentmapId = manager.CurrentMapId;
    Map currentMap = trans.GetObject(currentmapId, OpenMode.ForWrite) as Map;
 
    IEnumerator iterator = currentMap.NewIterator(true, true);
    Type groupType = typeof(Autodesk.Gis.Map.DisplayManagement.Group);
 
    while (iterator.MoveNext())
    {
      ObjectId objId = (ObjectId)iterator.Current;
      Object obj = trans.GetObject(objId, OpenMode.ForWrite);              
 
      if (obj.GetType().ToString() == "Autodesk.Gis.Map.DisplayManagement.BaseElement")
      {
        Autodesk.Gis.Map.DisplayManagement.BaseElement baseElement = obj as Autodesk.Gis.Map.DisplayManagement.BaseElement;
        baseElement.SetVisible(0, false);                  
      }
    }
  }
  trans.Commit();
}