将当前cad图中实体复制到另一个新的dwg的块中，并插入块——CAD c#实现

 本案例为：将当前cad图中实体复制到另一个cad的块中，并插入块。

目前代码尚未调试成功，找bug中......

  public class Demo 
  {
    [CommandMethod("xx1")]
    public void XXA()
    {
            // 获取当前文档和数据库
            Document currentDoc = Application.DocumentManager.MdiActiveDocument;
            Database currentDb = currentDoc.Database;
            Editor ed = currentDoc.Editor;
            
            // 定义块名称
            string blockName = "ExportedBlock";

            try
            {
                // 存储模型空间对象的 ObjectId 到数组中
                ObjectIdCollection objectIds = new ObjectIdCollection();

                using (Transaction tr = currentDb.TransactionManager.StartTransaction())
                {
                    BlockTable bt = (BlockTable)tr.GetObject(currentDb.BlockTableId, OpenMode.ForRead);
                    BlockTableRecord modelSpace = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.