问使用.NET切换API v8

EN

    private const string TogglTasksUrl = "https://www.toggl.com/api/v8/tasks.json";
    private const string TogglAuthUrl = "https://www.toggl.com/api/v8/me"; //sessions.json";

    private const string AuthenticationType = "Basic";
    private const string ApiToken = "user token goes here";
    private const string Password = "api_token";

    public static void Main(string[] args)
    {
        CookieContainer container = new CookieContainer();
        var authRequest = (HttpWebRequest)HttpWebRequest.Create(TogglAuthUrl);

        authRequest.Credentials = CredentialCache.DefaultCredentials;
        authRequest.Method = "POST";
        authRequest.ContentType = "application/x-www-form-urlencoded";
        authRequest.CookieContainer = container;

        string value = ApiToken; //= Convert.ToBase64String(Encoding.Unicode.GetBytes(ApiToken));
        value = string.Format("{1}:{0}", Password, value);
        //value = Convert.ToBase64String(Encoding.Unicode.GetBytes(value));
        authRequest.ContentLength = value.Length;
        using (StreamWriter writer = new StreamWriter(authRequest.GetRequestStream(), Encoding.ASCII))
        {
            writer.Write(value);
        }

        try
        {
            var authResponse = (HttpWebResponse)authRequest.GetResponse();
            using (var reader = new StreamReader(authResponse.GetResponseStream(), Encoding.UTF8))
            {
                string content = reader.ReadToEnd();
            }

            HttpWebRequest tasksRequest = (HttpWebRequest)HttpWebRequest.Create(TogglTasksUrl);
            tasksRequest.CookieContainer = container;

            //var jsonResult = string.Empty;
            var tasksResponse = (HttpWebResponse)tasksRequest.GetResponse();
            MemoryStream ms = new MemoryStream();
            tasksResponse.GetResponseStream().CopyTo(ms);
            //using (var reader = new StreamReader(tasksResponse.GetResponseStream(), Encoding.UTF8))
            //{
            //    jsonResult = reader.ReadToEnd();
            //}

            ms.Seek(0, SeekOrigin.Begin);
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Task));
            var tasks = ser.ReadObject(ms) as List<Task>;
            ms.Close();
            //var tasks = DataContractJsonConvert.DeserializeObject<Task[]>(jsonResult);

            foreach (var task in tasks)
            {
                Console.WriteLine(
                    "{0} - {1}: {2} starting {3:yyyy-MM-dd HH:mm}",
                    task.Project.Name,
                    task.Description,
                    TimeSpan.FromSeconds(task.Duration),
                    task.Start);
            }

        }
        catch (System.Exception ex)
        {

            throw;
        }
    }

                var authResponse = (HttpWebResponse)authRequest.GetResponse();