Samplecode.cs

using System;
using System.IO;
using System.Text;
using System.Net;
using Newtonsoft.Json;

namespace apisamples
{
    public class HealthwiseAgent
    {
        public string GetBearerToken(string clientId, string clientSecret)
        {
            var req = HttpWebRequest.Create("https://auth.test.test-products.local/v1/oauth2/token");

            string basicToken = string.Format("Basic {0}",
                Convert.ToBase64String(Encoding.ASCII.GetBytes(clientId + ":" + clientSecret))
                );

            req.Headers.Add("Authorization", basicToken);
            req.ContentType = "application/json";
            req.Method = "POST";

            using (var writer = new StreamWriter(req.GetRequestStream()))
            {
                writer.Write(@"{'grant_type' : 'client_credentials','scope' : '*','expires_in' : '86400'}");
            }

            dynamic obj;

            using (var res = (HttpWebResponse)req.GetResponse())
            using (var sr = new StreamReader(res.GetResponseStream()))
            {
                //Should probably use a defined type to deserialize
                obj = JsonConvert.DeserializeObject<dynamic>(sr.ReadToEnd());
            }

            return obj.access_token.ToString();
        }

        public string GetConsumer(string bearerToken, string consumerId)
        {
            var req = HttpWebRequest.Create("https://consumer.test.test-products.local/v1/consumers/" + consumerId);

            req.Headers.Add("Authorization", "Bearer " + bearerToken);
            req.ContentType = "application/json";
            req.Method = "GET";

            dynamic obj;

            using (var res = (HttpWebResponse)req.GetResponse())
            using (var sr = new StreamReader(res.GetResponseStream()))
            {
                obj = JsonConvert.DeserializeObject<dynamic>(sr.ReadToEnd());
            }
            return obj.ToString();
        }
    }
}

Sequence.cs

        static void Main(string[] args)
        {
            var clientId = "topsecret";
            var clientSecret = "topsecret";
            
            var agent = new HealthwiseAgent();
            var bearer = agent.GetBearerToken(clientId, clientSecret);
            Console.WriteLine(agent.GetConsumer(bearer, "christest1"));

        }