[Solved] Create a listing using etsy api from a desktop application

by 


var baseUrl = "http://openapi.etsy.com/v2/listings";
    restClient = new RestClient(baseUrl);
    oAuth = new OAuthBase();
    e1 = new Etsy_portal(consumerKey, consumerSecret);
    string str = e1.GetConfirmUrl(out AccessToken, out AccessTokenSecret);
    e1.ObtainTokenCredentials(AccessToken, AccessTokenSecret, verifiedToken, out PAccessToken, out PAccessTokenSecret);
    sigHasher = new HMACSHA1(new ASCIIEncoding().GetBytes(string.Format("{0}&{1}", consumerSecret, PAccessTokenSecret)));
    string nonce = oAuth.GenerateNonce();
    string timeStamp = oAuth.GenerateTimeStamp();
    string normalizedUrl;
    string normalizedRequestParameters;
    var data = new Dictionary<string, string> {
        { "title", "This is a test1" },
        { "description", "Test Description1" },
        { "quantity", "1" },
        { "price", "5" },
        { "is_supply", "false" },
        { "state", "draft" },
        { "when_made", "2010_2017" },
        { "who_made", "i_did" },
        { "shipping_template_id", "43862539760" }
    };


    data.Add("oauth_consumer_key", consumerKey);
    data.Add("oauth_signature_method", "HMAC-SHA1");
    data.Add("oauth_timestamp", timeStamp);
    data.Add("oauth_nonce", nonce); // Required, but Twitter doesn't appear to use it, so "a" will do.
    data.Add("oauth_token", PAccessToken);
    data.Add("oauth_version", "1.0");
    data.Add("oauth_signature", GenerateSignature(baseUrl, data));
    string oAuthHeader = GenerateOAuthHeader(data);
    var formData = new FormUrlEncodedContent(data.Where(kvp => !kvp.Key.StartsWith("oauth_")));
    using (var http = new HttpClient())
    {
        http.DefaultRequestHeaders.Add("Authorization", oAuthHeader);
        var httpResp = http.PostAsync(baseUrl, formData);
        var respBody = httpResp.Result;

    }

solved Create a listing using etsy api from a desktop application