Erro no StreamReader

StreamReader reader = new StramReader(responseStream, Encoding.UTF8); Esse código da erro, e eu importei todas as bibliotecas. O mesmo fala q eu não posso converter consoleApplication.StrreamReader para System.IO.StreamReader.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web;



namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            string resposta;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("");
            request.Method = "GET";

            WebResponse response = request.GetResponse();
            using(Stream responseStream = response.GetResponseStream())
            {
                StreamReader reader = new StramReader(responseStream, Encoding.UTF8);
                resposta = reader.ReadToEnd();
            }
            Console.Write(resposta);
            Console.Read();
        }
    }
}