Post message from ASP.NET app to Twitter - twitter

Question

I am using very simple code to post message in twitter. The code is as given below:
public void UpdateStatus(string username, string password, string tweetMsg)
{
byte[] bytes = System.Text.Encoding.ASCII.GetBytes("status=" + tweetMsg);
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://twitter.com/statuses/update.xml");
request.Credentials = new NetworkCredential(username, password);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ServicePoint.Expect100Continue = false;
string statusUpdate = string.Empty;
using (StreamWriter sw = new StreamWriter(request.GetRequestStream()))
{
statusUpdate = "status=" + System.Web.HttpUtility.UrlEncode(tweetMsg);
sw.Write(statusUpdate);
}
using (HttpWebResponse resp = (HttpWebResponse) request.GetResponse())
{
// Handle response here
using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
{
Console.WriteLine(sr.ReadToEnd());
}
}
}
catch (WebException ex)
{
Console.WriteLine("Web Error: {0}", ex.Message);
if (ex.Response != null)
{
HttpWebResponse r = (HttpWebResponse)ex.Response;
using (StreamReader esr = new StreamReader(r.GetResponseStream()))
{
Console.WriteLine("Error: {0}", esr.ReadToEnd());
}
}
}
catch (IOException ex)
{
Console.WriteLine("I/O Error: {0}", ex.Message);
}
}
I am not sure why this code is not working. I am getting the exception
The remote server returned an error: (401) Unauthorized.
But, whichever site I am referring, everywhere I find that people are able to post their messages using the same code.
Can anybody please tell me what I am missing in this code? The site that I referred for this code is http://www.dreamincode.net/forums/topic/120468-twitter-api-posting-status/
Thanks in advance....
Hari

Answer 1

The Twitter API no longer supports Basic Auth for authentication. You need to switch to OAuth which uses tokens instead of passwords.
Twitter's guide to transitioning from Basic Auth to OAuth
OAuth homepage