How to retrieve all items from "public folders" and its "sub-folders" in exchange server2010 uisng managed API???

 rootfolder = Folder.Bind(service,WellKnownFolderName.PublicFoldersRoot);
rootfolder.Load();                                             
foreach (Folder folder in rootfolder.FindFolders(new FolderView(int.MaxValue)))
{
  FindItemsResults<Item> findResults = folder.FindItems(iv); 
     foreach (Item item in findResults)

             {
                //get item info;
             } 
}

"If i do like this i am not getting items present in sub-folders of it..public folders does not support deep traversal queries too..How can i get items from sub-folders of public folders???"