C# Consume REST Service using HttpClient

HttpClient http = new HttpClient();
        HttpQueryString qs = new HttpQueryString();
        qs.Add("code", "xxx");
        qs.Add("apikey", "xxx");
        Uri u = new Uri("http://xxx");
        HttpResponseMessage rm = http.Get(u,qs);
        rm.EnsureStatusIsSuccessful();    
        string s = rm.Content.ReadAsString();