It's interesting that the example code shown is so clunky. It uses try-finally to manually dispose the resource when the idiomatic way would be to wrap it in a using block:

  using (var file2 = new StreamReader(file))
  {
    while ((line = file2.ReadLine()) != null)
      Console.WriteLine(line);
  }

It's possible this is a badly picked example but it shows one big downside of this -- the lack of discussion about the sample code that you would normally get at e.g. Stack Overflow or a blog.