using (IEnumerator<string> filepaths = System.IO.Directory.EnumerateFiles(startPath, "*", System.IO.SearchOption.AllDirectories).GetEnumerator())
            {
  while (true){
        try{
          if (!filepaths.MoveNext()){//im getting OOM here
             break;
             }
           }catch (Exception e){
            }
        }
  }

foreach(string path in System.IO.Directory.EnumerateFiles(startPath, "*", System.IO.SearchOption.AllDirectories)){
//do the processing in path
}