Create new Zendesk.com ticket - simplest possible C# code

ZendeskCreateTicket.cs

using System;
using System.IO;
using System.Net;
using System.Text;

namespace DHlavaty
{
    public class Zendesk
    {
        /*
         * The biggest headache was to figure out, that Zendesk servers could not parse ByteOrderMark in HTTP request.
         * So you cannot use "System.Text.Encoding.UTF8" but you must use "new System.Text.UTF8Encoding(false)" instead
         * in your requests.
         * 
         * */
        public int CreateZendeskTicket(string subject, string message, string senderName, string senderEmail)
        {
            if (String.IsNullOrWhiteSpace(subject) || String.IsNullOrWhiteSpace(message) || String.IsNullOrWhiteSpace(senderName) || String.IsNullOrWhiteSpace(senderEmail))
            {
                return -1;
            }

            string jsonToSend = "{\"ticket\":{\"subject\":\"" + subject + "\",\"comment\":{\"body\":\"" + message + "\"},\"requester\":{\"name\":\"" + senderName + "\",\"email\":\"" + senderEmail + "\"}}}";

            string responseData = null;
            string responseHeaders = null;
            int responseStatusCode = 0;
            const string zendeskDomain = "yourdomain.zendesk.com"; // <-- your Zendesk domain
            const string zendeskLoginEmail = "your@email.here.com"; // <-- add your login here
            const string zendeskApiKey = "abcdvMPtSPkfh37f1zNWXseNWD3g9Ur7rsjpabcd"; // <-- add your ApiKey here

            try
            {
                var wc = new WebClientEx();
                wc.Proxy = null;
                wc.Headers.Add(System.Net.HttpRequestHeader.Authorization, "Basic " + Convert.ToBase64String(Encoding.UTF8.GetBytes(zendeskLoginEmail + "/token:" + zendeskApiKey)));
                wc.Headers.Add(System.Net.HttpRequestHeader.ContentType, "application/json");

                var wr = wc.GetWebRequestX(new Uri("https://" + zendeskDomain + "/api/v2/tickets.json"));
                wr.Method = System.Net.WebRequestMethods.Http.Post;

                using (StreamWriter writer = new StreamWriter(wr.GetRequestStream(), new System.Text.UTF8Encoding(false))) // <--- DO NOT USE System.Text.Encoding.UTF8 IN HERE, because it emits ByteOrderMark
                {
                    writer.WriteLine(jsonToSend);
                }

                using (System.Net.WebResponse response = wr.GetResponse())
                {
                    WebClientEx.ProcessResponse(response, out responseData, out responseHeaders, out responseStatusCode);
                }
            }
            catch (System.Net.WebException ex)
            {
                using (ex.Response)
                {
                    WebClientEx.ProcessResponse(ex.Response, out responseData, out responseHeaders, out responseStatusCode);
                }

                responseData = "<!-- " + ex.Message + " -->\r\n\r\n" + responseData;
            }

            return responseStatusCode;
        }

        public class WebClientEx : WebClient
        {
            /// <summary>
            /// See <see cref="System.Net.WebRequest.GetWebRequest"/>
            /// </summary>
            /// <param name="address">See <see cref="System.Net.WebRequest.GetWebRequest"/></param>
            /// <returns>See <see cref="System.Net.WebRequest.GetWebRequest"/></returns>
            public virtual System.Net.WebRequest GetWebRequestX(Uri address)
            {
                return this.GetWebRequest(address);
            }

            public static void ProcessResponse(System.Net.WebResponse response, out string serverResponseData, out string responseHeaders, out int responseStatusCode)
            {
                serverResponseData = responseHeaders = String.Empty;
                responseStatusCode = 0;

                using (var responseStream = response.GetResponseStream())
                {
                    using (System.IO.StreamReader sr = new System.IO.StreamReader(responseStream, Encoding.UTF8))
                    {
                        serverResponseData = sr.ReadToEnd();
                    }
                }

                responseHeaders = response.Headers.ToString();
                var httpWebResponse = response as System.Net.HttpWebResponse;
                if (httpWebResponse != null)
                {
                    responseStatusCode = (int)httpWebResponse.StatusCode;
                }
            }
        }
    }
}