Formas de hacer un http request con C#

send_get_dotnet_WebClient.cs

using (var client = new WebClient())
{
    ServicePointManager.Expect100Continue = false;

    try
    {
        var values = new NameValueCollection();
        values["id"] = id;
        values["k"] = k;
        values["s"] = s;

        client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        var response = client.UploadValues(URLApi + "/Clients/", values);
        v = Encoding.UTF8.GetString(response);
        
        licInfo = JsonConvert.DeserializeObject<LicInfo>(v);
    }
    catch (WebException wex)
    {
        var response = wex.Response as HttpWebResponse;
        if (response != null && response.StatusCode == HttpStatusCode.BadRequest)
        {
            Log("El servidor remoto respondió Bad Request:" wex.ToString());
            using (var reader = new StreamReader(wex.Response.GetResponseStream()))
            {
                var responseText = reader.ReadToEnd();
                if (!string.IsNullOrEmpty(responseText))
                {
                    LicInfo result = JsonConvert.DeserializeObject<LicInfo>(responseText);
                    Log(result.message);
                }
            }
        }

        if (!string.IsNullOrEmpty(wex.Message))
            Log(wex.Message);
    }
    catch (Exception ex)
    {
        Log(ex.ToString());
    }
}

with_RestClient.cs

public class v2
    {
        internal static ResponseBindingModel Request(InstancesCloud k, string serviceURL, string ApiPath)
        {
            try
            {
                /*
                  How to used!
                  http://restsharp.org/
                */
                var client = new RestClient(ServiceURL);
                var request = new RestRequest(ApiPath, Method.POST);

                request.AddHeader("accept", "application/json");
                request.AddHeader("content-type", "application/json");

                request.AddParameter("application/json", JsonConvert.SerializeObject(k), ParameterType.RequestBody);

                IRestResponse response = client.Execute(request);
                if (!string.IsNullOrEmpty(response.ErrorMessage))
                    return "Error en el API De " + ApiPath + ". Detalle " + response.ErrorMessage;

                if (response.StatusCode.Equals(HttpStatusCode.BadRequest) || response.StatusCode.Equals(HttpStatusCode.InternalServerError))
                    return "Error en el API De " + ApiPath + ". Detalle " + response.Content;

                if (response.StatusCode.Equals(HttpStatusCode.OK))
                    return JsonConvert.DeserializeObject<ResponseBindingModel>(response.Content).ToString();

                return new ResponseBindingModel { error = "Error al Consultar el API De " + ApiPath + "." };
            }
            catch (Exception ex)
            {
                return new ResponseBindingModel { error = "Error al Consultar el API De " + ApiPath + ". Detalle " + ex.ToString() };
            }
        }
    }