OAuth with twitter

I download tweetsharp and twitterizer and I can not make it work. I try tweetsharp with the basic following sample

TwitterService Service = new TwitterService(consumerKeyTw, consumerSecretTW);
OAuthRequestToken requestToken = Service.GetRequestToken("http://localhost:1470/Twitterr/OAuth"); 开发者_如何学C// <--  callback URL

I always get a false Token. I also try twitterizer, which came with a simple example. I copy and paste the keys. But I also never get back the token.

I try with tweetsharp deleting the url callback and it worked! But off course twitter didn't go to my callback url. On dev.twitter I setup for Registered Callback URL the above url. But I still don't get the token.

Any Idea? What I'am missing? Do you know any way to debug and test my code with a localhost? Thanks!

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Answered here: The remote server returned an error: (401) Unauthorized. Twitter oAuth

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Most probably it's because of "localhost" not pointing to your webserver from twitters point of view.