AutoCAD .NET 二次开发（2020版）选择特定对象另存为新文件

//spObjectId 对象的ID
//path 保存路径
//注意，实际内部使用了ObjectIdCollection 对象，一次可以保存多个ID
public static void SaveObject(ObjectId spObjectId, string path)
{
    var sourceDb = splineId.Database;
    using (var targetDb = new Database(true, true))
    {
        var ids = new ObjectIdCollection { spObjectId};
        sourceDb.Wblock(targetDb, ids, Point3d.Origin, DuplicateRecordCloning.Ignore);
        targetDb.SaveAs(path, DwgVersion.Current);
    }
}