IPP DevDefined POST TaxService

post.cs

/* post
{
  "TaxCode": "MyTaxCodeName",
  "TaxRateDetails": [
    {
      "TaxRateName": "myNewTaxRateName",
      "RateValue": "8",
      "TaxAgencyId": "1",
      "TaxApplicableOn": "Sales"
    }
  ]
}
*/

//query = "taxservice/taxcode"

public static string ExecuteV3Query(string query, string post = null)
{
    string uri = string.Format("https://quickbooks.api.intuit.com/v3/company/{0}/{1}", CompanyId, query);
    HttpWebRequest httpWebRequest = WebRequest.Create(uri) as HttpWebRequest;
    httpWebRequest.Method = post == null ? "GET" : "POST";
    httpWebRequest.Accept = "application/json";
    httpWebRequest.Headers.Add("Authorization", GetDevDefinedOAuthHeader(httpWebRequest, post));

    if (post != null)
    {
        var bytes = new UTF8Encoding().GetBytes(post);
        Stream postStream = httpWebRequest.GetRequestStream();
        postStream.Write(bytes, 0, bytes.Length);
        postStream.Flush();
        postStream.Close();
    }
            
    HttpWebResponse httpWebResponse = httpWebRequest.GetResponse() as HttpWebResponse;
    using (Stream data = httpWebResponse.GetResponseStream())
    {
        return new StreamReader(data).ReadToEnd();
    }

}