[twitter-dev] Update background image using oAuth c#

[Alexandr Shemyakin]

Hi. I tried to update my background using oath. But i have 401
unauthorized error

           var credentials = new OAuthCredentials
            {
                Type = OAuthType.ProtectedResource,
                SignatureMethod = OAuthSignatureMethod.HmacSha1,
                ParameterHandling =
OAuthParameterHandling.HttpAuthorizationHeader,
                ConsumerKey = _consumerKey,
                ConsumerSecret = _consumerSecret,
                Token = _oauth_access_token,
                TokenSecret = _oauth_access_token_secret,
                Version = "1.0",
            };

            var client = new RestClient
            {
                Authority = "http://api.twitter.com";,
                Credentials = credentials,
            };


            var request = new RestRequest
            {
                Path = "1/account/
update_profile_background_image.json",
                Method = WebMethod.Post
            };
            var webClient = new WebClient();
            byte[] imageBytes = webClient.DownloadData("http://
www.google.com/images/logos/ps_logo2.png");
            request.AddFile("file1", "ps_logo2.png", new
MemoryStream(imageBytes), "image/png");
            RestResponse postResponse = client.Request(request);

Can you help me?

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