using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Net;

namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            String outMsg="";

          String result=  Request("url",

                "GET", "", "", out outMsg);

          Console.WriteLine(result);

          Console.WriteLine(outMsg);

          Console.ReadKey();

        }

        public static string Request(string sUrl, string sMethod, string sEntity, string sContentType,

    out string sMessage)

        {

            try

            {

                sMessage = "";

                using (System.Net.WebClient client = new System.Net.WebClient())

                {

                    client.Credentials = CreateAuthenticateValue(sUrl);

                    WebHeaderCollection customerHeader= new WebHeaderCollection();

                    customerHeader.Add(HttpRequestHeader.Accept, "application/json");

                    customerHeader.Add(HttpRequestHeader.ContentType, "application/json;charset=UTF-8");

                    client.Headers = customerHeader;

                    Uri url = new Uri(sUrl);

                    byte[] bytes = Encoding.UTF8.GetBytes(sEntity);

                    byte[] buffer;

                    switch (sMethod.ToUpper())

                    {

                        case "GET":

                            buffer = client.DownloadData(url);

                            break;

                        case "POST":

                            buffer = client.UploadData(url, "POST", bytes);

                            break;

                        default:

                            buffer = client.UploadData(url, "POST", bytes);

                            break;

                    }

                    return Encoding.UTF8.GetString(buffer);

                }

            }

            catch (WebException ex)

            {

                sMessage = ex.Message;

                var rsp = ex.Response as HttpWebResponse;

                var httpStatusCode = rsp.StatusCode;

                var authenticate = rsp.Headers.Get("WWW-Authenticate");

                return "";

            }

            catch (Exception ex)

            {

                sMessage = ex.Message;

                return "";

            }

        }

        private static CredentialCache CreateAuthenticateValue(string sUrl)

        {

            CredentialCache credentialCache = new CredentialCache();

            credentialCache.Add(new Uri(sUrl), "Digest", new NetworkCredential("admin", "password"));

            return credentialCache;

        }

    }

}