Get Remote HTML Code as String

Here is an example function to get the full html output code of an URL provided to the function into a string.
You can get the data by using a string variable which gets the output:

string variable = gethtmlcontent("https://thisisapage");

            public string gethtmlcontent(String URL)
            {
                    HttpWebRequest request;
                    HttpWebResponse response;
                        try
                        {   request = (HttpWebRequest)WebRequest.Create(URL);
                            response = (HttpWebResponse)request.GetResponse();
                        }  catch (WebException) { this.searchcode = false;  return null; }
                           catch (Exception) { this.searchcode = false; return null; }

                    if (response.StatusCode == HttpStatusCode.OK)
                    {
                        Stream receiveStream = response.GetResponseStream();
                        StreamReader readStream;
                        if (String.IsNullOrWhiteSpace(response.CharacterSet)){
                                readStream = new StreamReader(receiveStream);}
                        else {readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));}
                        string data = readStream.ReadToEnd();
                        response.Close();
                        readStream.Close();
                        return data;
                    }
                    
                    this.contextcode = false;
                    response.Close();
                    return null;
            }