How to get content from file from this URL?

var webRequest = WebRequest.Create(@"http://yourUrl");

using (var response = webRequest.GetResponse())
using(var content = response.GetResponseStream())
using(var reader = new StreamReader(content)){
    var strContent = reader.ReadToEnd();
}

This will place the contents of the request into strContent.

Or as adrianbanks mentioned below simply use WebClient.DownloadString()