Spotify.NET/SpotifyAPI/SpotifyWebAPI/ClientCredentialsAuth.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Net;
using System.Collections.Specialized;
using Newtonsoft.Json;
using SpotifyAPI.SpotifyWebAPI.Models;
using System.IO;

namespace SpotifyAPI.SpotifyWebAPI
{
    public class ClientCredentialsAuth
    {
        public Scope Scope { get; set; }
        public String ClientId { get; set; }
        public String ClientSecret { get; set; }
        
        public Token DoAuth()
        {
            using(WebClient wc = new WebClient())
            {
                wc.Proxy = null;
                wc.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(Encoding.UTF8.GetBytes(ClientId + ":" + ClientSecret)));
                
                NameValueCollection col = new NameValueCollection();
                col.Add("grant_type","client_credentials");
                col.Add("scope", Scope.GetStringAttribute(" "));

                byte[] data = null;
                try
                {
                    data = wc.UploadValues("https://accounts.spotify.com/api/token", "POST", col);
                }catch(WebException e)
                {
                    String test = new StreamReader(e.Response.GetResponseStream()).ReadToEnd();
                }
                return JsonConvert.DeserializeObject<Token>(Encoding.UTF8.GetString(data));
            }
        }
    }
}