C#: HttpWebRequest example with error handling using C#

using System;
using System.IO;
using System.Net;
using System.Text;
 
public class HttpWebRequestTool
{
  public static void Main(String[] args)
  {
    if (args.Length < 2)
    {
      Console.WriteLine("Missing argument. Need a URL and a filename");
    }
    else
    {
      StreamWriter sWriter = new StreamWriter(args[1]);
      sWriter.Write(WRequest(args[0], "GET", ""));
      sWriter.Close();
    }
  }
 
  public static string WRequest(string URL, string method, string postData)
  {
    string responseData = "";
    try
    {
      System.Net.HttpWebRequest hwrequest =
        (System.Net.HttpWebRequest) System.Net.WebRequest.Create(URL);
      hwrequest.Accept = "*/*";
      hwrequest.AllowAutoRedirect = true;
      hwrequest.UserAgent = "http_requester/0.1";
      hwrequest.Timeout= 60000;
      hwrequest.Method = method;
      if (hwrequest.Method == "POST")
      {
        hwrequest.ContentType = "application/x-www-form-urlencoded";
        // Use UTF8Encoding instead of ASCIIEncoding for XML requests:
        System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
        byte[] postByteArray = encoding.GetBytes(postData);
        hwrequest.ContentLength = postByteArray.Length;
        System.IO.Stream postStream = hwrequest.GetRequestStream();
        postStream.Write(postByteArray, 0, postByteArray.Length);
        postStream.Close();
      }
      System.Net.HttpWebResponse hwresponse =
        (System.Net.HttpWebResponse) hwrequest.GetResponse();
      if (hwresponse.StatusCode == System.Net.HttpStatusCode.OK)
      {
        System.IO.Stream responseStream = hwresponse.GetResponseStream();
        System.IO.StreamReader myStreamReader =
          new System.IO.StreamReader(responseStream);
        responseData = myStreamReader.ReadToEnd();
      }
      hwresponse.Close();
    }
    catch (Exception e)
    {
      responseData = "An error occurred: " + e.Message;
    }
    return responseData;
  }
}