How to get plaintext from the response of a WebRequest class in C#

I want to get plain text using WebRequest class, just like what we get when we use webbrowser1.Document.Body.InnerText . I have tried the following code

public string request_Resource()
{
   HttpWebRequest request = (HttpWebRequest)WebRequest.开发者_开发知识库Create(myurl);
   Stream stream = request.GetResponse().GetResponseStream();
   StreamReader sr = new StreamReader(stream);
   WebBrowser wb = new WebBrowser();
   wb.DocumentText = sr.ReadToEnd();
   return wb.Document.Body.InnerText;
}

when i execute this is get a NullReferenceException.

Is there a better way to get a plain text.

Note: I cannot use webbrowser control directly to load the webpage, because, i don't want to deal with all those events that fire up multiple times when ever a page is loaded.

UPDATE: I have changed my code to use WebClient Class instead of WebRequest upon suggestion My code looks something like this now

public string request_Resource()
{
   WebClient wc = new WebClient();
   wc.Proxy = null;
   //The user agent header is added to avoid any possible errors
   wc.Headers.Add("user-agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10 ( .NET CLR 3.5.30729; .NET4.0C)");
   return wc.DownloadString(myurl);
}

I am considering using HTML Utility Pack, can anyone suggest any better alternative.

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You're looking for the HTML Agility Pack, which can parse the HTML without IE.
It has an InnerText property.

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To answer your question, you need to wait for the browser to parse the text.

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By the way, you should use the WebClient class instead of WebRequest.

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Use webclient:

public string request_Resource()
{
    WebClient wc = new WebClient();
    byte[] data = wc.DownloadData(myuri);
    return Encoding.UTF8.GetString(data);
}

This will give you the content of the website. Then you can use HtmlAgilityPack to parse the result.

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If you need just plain HTML text, then you have already wrote that code.

public string request_Resource()
{
   HttpWebRequest request = (HttpWebRequest)WebRequest.Create(myurl);
   Stream stream = request.GetResponse().GetResponseStream();
   StreamReader sr = new StreamReader(stream);
   return sr.ReadToEnd();
}