/// 

/// Returns the content of a given web adress as string.
/// 
/// URL of the webpage
/// Website content
public string DownloadWebPage(string Url)
{
    // Open a connection
    HttpWebRequest WebRequestObject = (HttpWebRequest)HttpWebRequest.Create(Url);
 
    // You can also specify additional header values like 
    // the user agent or the referer:
    WebRequestObject.UserAgent = ".NET Framework/2.0";
    WebRequestObject.Referer = "http://www.example.com/";
 
    // Request response:
    WebResponse Response = WebRequestObject.GetResponse();
 
    // Open data stream:
    Stream WebStream = Response.GetResponseStream();
 
    // Create reader object:
    StreamReader Reader = new StreamReader(WebStream);
 
    // Read the entire stream content:
    string PageContent = Reader.ReadToEnd();
 
    // Cleanup
    Reader.Close();
    WebStream.Close();
    Response.Close();
 
    return PageContent;
}

string PageContent = DownloadWebPage("http://www.jonasjohn.de/");