Can I return a StreamReader from a method?

Can I return a StreamReader from开发者_运维知识库 a method ?

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Yes, of course. It's not a great idea, though - you're creating the StreamReader in one method, and closing it in another. It's better practice to create and close the reader in one method.

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Sure. Using normal IDispose semantics, here is how it would look:

  StreamReader MakeStreamReader () {
     return new StreamReader ("somefile.txt");
  }

  void Caller () {
     using (StreamReader r = MakeStreamReader ()) 
        Console.WriteLine (r.ReadToEnd ());
  }