Сохранение листов в отдельный файл

        [CommandMethod("GRF", "SaveLayouts", "MyCommandLocal", CommandFlags.Modal)]
        public static void SaveLayouts() {
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Database acCurDb = acDoc.Database;
            using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) {
                LayoutManager acLayoutManager = LayoutManager.Current;

                for (Int32 i = 0; i < acLayoutManager.LayoutCount; i++) {
                    Layout acLayout = acTrans.GetObject(acLayoutManager.GetLayoutId(acLayoutManager.CurrentLayout), OpenMode.ForRead) as Layout;
                    acDoc.Editor.WriteMessage("\nCurrent lyaout: " + acLayout.LayoutName);
                    
                    String fileName = acLayout.LayoutName;
                }
            }
            // Put your command code here
        }

        [CommandMethod("GRF", "SaveLayouts", "MyCommandLocal", CommandFlags.Modal)]
        public static void SaveLayouts() {
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Editor acEditor = acDoc.Editor;
            Database acCurDb = acDoc.Database;

            using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) {
                DBDictionary layoutDict = (DBDictionary)acTrans.GetObject(acCurDb.LayoutDictionaryId, OpenMode.ForWrite);

                Int32 iLayout = 0;
                foreach (DictionaryEntry id in layoutDict) {
                    
                    // При второй итерайии вылетает ошибка на этой строчке....
                    // С сообщением: Операция является недопустимой из-за текущего состояния объекта.
                    //
                    // Режим поменял на OpenMode.ForWrite но эффекта нет...
                    Layout ltr = (Layout)acTrans.GetObject((ObjectId)id.Value, OpenMode.ForWrite);

                    if (ltr.LayoutName.ToLower() != "model") {
                        acEditor.WriteMessage("\nLayout N{0} = {1}", ++iLayout, ltr.LayoutName);
                        LayoutManager.Current.CurrentLayout = ltr.LayoutName;
                        
                        // При первой итерации происходит установка текущего Листа
                        acTrans.Commit();
                    }
                }
            }
        }

        [CommandMethod("GRF", "ExportL", "MyCommandLocal", CommandFlags.Modal)]
        public static void ExportLayouts() {
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Editor acEditor = acDoc.Editor;
            Database acCurDb = acDoc.Database;
            String[] layouts = null;

            using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) {
                DBDictionary layoutDict = (DBDictionary)acTrans.GetObject(acCurDb.LayoutDictionaryId, OpenMode.ForRead);

                Int32 iLayout = 0;
                layouts = new string[layoutDict.Count];

                foreach (DictionaryEntry id in layoutDict) {
                    Layout ltr = (Layout)acTrans.GetObject((ObjectId)id.Value, OpenMode.ForRead);
                    if (ltr.LayoutName.ToLower() != "model") {
                        layouts[++iLayout] = ltr.LayoutName;
                    }
                }
            }

            LayoutManager acLayoutManager = null;
            foreach (String layout in layouts) {

                if (layout != null) {
                    acLayoutManager = LayoutManager.Current;
                    acLayoutManager.CurrentLayout = layout;
                    //Проверка на корректность имен файла опущена 
                    CommandLine.Export(@"D:\" + layout);
                }
            }        }

        [CommandMethod("GRF", "ExportL", "MyCommandLocal", CommandFlags.Modal)]
        public static void ExportLayouts()
        {
            Document acDoc = Application.DocumentManager.MdiActiveDocument;
            Editor acEditor = acDoc.Editor;
            Database acCurDb = acDoc.Database;
            String[] layouts = null;

            using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
            {
                DBDictionary layoutDict = (DBDictionary)acTrans.GetObject(acCurDb.LayoutDictionaryId, OpenMode.ForRead);

                layoutDict.Cast<DictionaryEntry>().Select(n => (Layout)acTrans.GetObject((ObjectId)n.Value, OpenMode.ForRead))
                    .Where(n => n.LayoutName.ToLower() != "model").Select(n => { if (n != null) { LayoutManager.Current.CurrentLayout = n.LayoutName; 
                        CommandLine.Export(Path.Combine("D:", n.LayoutName)); } return n;}).ToArray();
            }            
        }