问我可以通过AutoCAD .NET API添加/删除.NET实体吗？

EN

BlockTableRecord blkTblRecTitle = 
    transaction.GetObject(blockTable[BlockTableRecord.PaperSpace], 
       OpenMode.ForWrite) as BlockTableRecord;
        foreach (ObjectId id in blkTblRecTitle)
        {
            DBObject obj = transaction.GetObject(id, OpenMode.ForWrite);
            BlockReference blkRef = obj as BlockReference;
            if (blkRef != null)
            {
                AttributeCollection attCol = blkRef.AttributeCollection;
                foreach (ObjectId objID in attCol)
                {
                    DBObject dbObj = transaction.GetObject(objID, 
                          OpenMode.ForWrite) as DBObject;

                    AttributeReference acAttRef = dbObj as 
                    AttributeReference;
                 }
             }
          }

using (MText acText = new MText())
{
       acText.Location = new Point3d(802, 106.5, 0);
       acText.TextHeight = 2;
       acText.Contents = "Hello World.\nNow need to right align text.";

       blkTblRecTitle.AppendEntity(acText);
       transaction.AddNewlyCreatedDBObject(acText, true);
}