string url = @"https://blockchain.info/rawaddr/385cR5DM96n1HvBDMzLHPYcw89fZAXULJP";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
           
using (WebResponse httpResponse = request.GetResponse())
{
   using (StreamReader reader = new StreamReader(httpResponse.GetResponseStream()))
   {
      history = JsonConvert.DeserializeObject(reader.ReadToEnd());
   }
}