CADViewX是一款可以浏览、转换和打印CAD文件的ActiveX控件，该控件可以分为Lite版和专业版，在专业版中可以通过CADEditor工具进行CAD实体的删除，具体如下：

CADViewLib.Group entities = CADViewX1.CADImage.Converter.get_Sections(CADViewLib.TxConvSection.csEntities);
     CADViewLib.Group sel_entities = new CADViewLib.Group();
     CADViewLib.Layer del_layer = CADViewX1.CADImage.Converter.get_Layers(j);

     for (int i = 0; i < entities.Count; i++)
     {
         CADViewLib.Entity ent = entities.get_Entities(i);
         if (ent.Layer == del_layer)
             sel_entities.AddEntity(ent);
     }

     Editor = CADViewX1.GetCADEditor();
     Editor.Select((CADViewLib.Entity)sel_entities);
     Editor.Delete();