acBlkTblRec.AppendEntity(acPoint);
newtrans.AddNewlyCreatedDBObject(acPoint, true);
newtrans.Commit();
acPoint.CreateExtensionDictionary();
TextNote txt
= new TextNote
(); txt.Note = finalstring;
DBDictionary extdict = (DBDictionary)acPoint.ExtensionDictionary.GetObject(OpenMode.ForWrite);
extdict.SetAt(TextNote.ExtensionDictionaryName, txt);
MyTrans.AddNewlyCreatedDBObject(txt, true);