ASP.NET

using System;
using System.IO;
using System.Net;
using System.Text;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string symbol = "SUNW";
            Uri uri = new Uri("http://finance.yahoo.com/d/quotes.csv?s=" + symbol + "&f=sl1d1t1c1ohgv&e=.csv");
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
            {
                string input;
                while ((input = sr.ReadLine()) != null)
                {
                    Console.WriteLine(input);
                }
                sr.Close();
            }
            Console.ReadLine();
        }
    }
}