Extension Method from String to TextReader... how do I close the stream?

Is it possible t开发者_开发技巧o create an extension method similar to this? How should I handle Closing() the stream when finished?

    public static TextReader ToTextReader(this string XML)
    {
        StringReader sr = new StringReader(XML);
        return sr;
    }

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You don't need to; when the calling code closes the TextReader (as it should), the Stream is automatically closed as well. There's no need to close both objects individually.

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You shouldn't. It's the responsibility of the caller to dipsose of the TextReader object and the corresponding Stream