Create User with Moodle Rest API

Moodle-RestCreateUser.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Serialization.Json;
using System.Web.Script.Serialization;
using System.Web;

namespace MoodleRestTest
{
    class Program
    {
        internal static string _token = "";
        static void Main(string[] args)
        {
            MoodleUser user = new MoodleUser();
            user.username = HttpUtility.UrlEncode("dorwin@fakeemail.com");
            user.password = HttpUtility.UrlEncode("Pass@Fakew0rd");
            user.firstname = HttpUtility.UrlEncode("Daryl");
            user.lastname = HttpUtility.UrlEncode("Orwin");
            user.email = HttpUtility.UrlEncode("dorwin@fakeemail.com");

            string postData = string.Format("users[0][username]={0}&users[0][password]={1}&users[0][firstname]={2}&users[0][lastname]={3}&users[0][email]={4}", user.username, user.password, user.firstname, user.lastname, user.email);

            HttpStatusCode httpStatusCode;
            var contents = RestCall("core_user_create_users", postData, out httpStatusCode);

            // Deserialize
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            if (contents.Contains("exception"))
            {
                // Error
                MoodleException moodleError = serializer.Deserialize<MoodleException>(contents);
            }
            else
            {
                // Good
                List<MoodleCreateUserResponse> newUsers = serializer.Deserialize<List<MoodleCreateUserResponse>>(contents);
            }
        }

        private static string RestCall(string serviceType, string postData, out HttpStatusCode statusCode)
        {
            string requestUrl = string.Format("https://apoudev.mrooms3.net/webservice/rest/server.php?wstoken={0}&wsfunction={1}&moodlewsrestformat=json", _token, serviceType);
            // Call Moodle REST Service
            HttpWebRequest req = (HttpWebRequest) WebRequest.Create(requestUrl);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";

            // Encode the parameters as form data:
            byte[] formData = Encoding.UTF8.GetBytes(postData);
            req.ContentLength = formData.Length;

            // Write out the form Data to the request:
            using (Stream post = req.GetRequestStream())
            {
                post.Write(formData, 0, formData.Length);
            }

            // Get the Response
            using (var resp = (HttpWebResponse) req.GetResponse())
            {
                statusCode = resp.StatusCode;
                using (var resStream = resp.GetResponseStream())
                {
                    //if (resStream != null)
                    using (var reader = new StreamReader(resStream)) //will throm if resStream is null
                    {
                        return reader.ReadToEnd();
                    }
                }
            }
        }

        public class MoodleUser
        {
            public string username { get; set; }
            public string password { get; set; }
            public string firstname { get; set; }
            public string lastname { get; set; }
            public string email { get; set; }
        }

        public class MoodleException
        {
            public string exception { get; set; }
            public string errorcode { get; set; }
            public string message { get; set; }
            public string debuginfo { get; set; }
        }

        public class MoodleCreateUserResponse
        {
            public string id { get; set; }
            public string username { get; set; }
        }
    }
}