Is it safe to use 'using' instead of closing a WebResponse and StreamReader

Question

Currently

I've implemented a simple helper method for HttpWebRequest called GetResponse(url). Currently I'm manually closing the WebResponse and StreamReader after reading the result. I'm then returning said result like so:

// construct the request
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";

// get the result
WebResponse response = request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string result = reader.ReadToEnd();

// clean up and return the result
reader.Close();
response.Close();
return result;

Proposed

Is it safe to encompass the return within using statements instead of closing them; will this have the same effect as the .Close()es?

// construct the request
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";

// get the result
using (WebResponse response = request.GetResponse())
{
    using (StreamReader reader = new StreamReader(response.GetResponseStream()))
    {
        return reader.ReadToEnd();
    }
}

Answer 1

That's not only safe - it's safer than the original, in that it will dispose of the objects even if an exception is thrown; a using statement is equivalent to a try/finally statement.

In general, whenever you write a Close() or Dispose() call explicitly, consider whether you could use a using statement instead.

(Note that you're not using the encoding from the web response, by the way - you're always assuming UTF-8. Using WebClient instead can make this simpler, if that's an option.)

Answer 2

I would suggest do this:

    string ret = string.Empty;
    using (WebResponse response = request.GetResponse())
    {
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {
            ret = reader.ReadToEnd();
        }
    }
    return ret;

it is safe to use "using", it will dispose the WebResponse and StreamReader, but it does not guarantee it will run the return.