using System;

using System.Linq;

using System.Text.RegularExpressions;

using System.Web;

using System.Net;

​

public class Program

{

    public static void Main()

    {

        using (var client = new WebClient())

        {

            client.Headers.Add("Accept-Language", " en-US");

            client.Headers.Add("Accept", " text/html, application/xhtml+xml, */*");

            client.Headers.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");

            var webpage = client.DownloadString("https://soundcloud.com");

            Regex regex = new Regex(@"<script[^>]+src=""([^""]+)""");

            MatchCollection scripts = regex.Matches(webpage);

            var scripts_toarray =

                from Match match in scripts

                select match.Value;

            string scripts_newflatChain = string.Join(" ", scripts_toarray);

            var linkParser = new Regex(@"\b(?:https?://|www\.)\S+\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);

            MatchCollection links = linkParser.Matches(scripts_newflatChain);

            foreach (Capture link in links)

            {

                var script = client.DownloadString(link.Value);

                Regex regex2 = new Regex(@"client_id\s*:\s*""([0-9a-zA-Z]{32})""");

                MatchCollection ids = regex2.Matches(script);

                foreach (Capture id in ids)

                {

                    Regex regex3 = new Regex(@"""(.*?)""");

                    MatchCollection clients = regex3.Matches(id.Value);

                    foreach (Match id_2 in clients)

                    {

                        Console.WriteLine(id_2.Groups[1].Value);

                    }

                }

            }

        }

    }

}