using System;

using System.Collections.Generic;

using System.Net.Http;

using System.Threading.Tasks;

​

using System.Text;

public class Program

{

        private static readonly HttpClient _Client = new HttpClient();

​

        static void Main(string[] args)

        {

            Run().Wait();

        }

​

        static async Task Run()

        {

            string url = "http://www.example.com/api/Customer";

            var json = "{ \"claim_id\": \"\", \"limit\":\"10\"}";

            var response = await Request(HttpMethod.Post, url, json, new Dictionary<string, string>());

            string responseText = await response.Content.ReadAsStringAsync();

​

            Console.WriteLine(responseText);

            Console.ReadLine();

        }

​

        /// <summary>

        /// Makes an async HTTP Request

        /// </summary>

        /// <param name="pMethod">Those methods you know: GET, POST, HEAD, etc...</param>

        /// <param name="pUrl">Very predictable...</param>

        /// <param name="pJsonContent">String data to POST on the server</param>

        /// <param name="pHeaders">If you use some kind of Authorization you should use this</param>

        /// <returns></returns>

        static async Task<HttpResponseMessage> Request(HttpMethod pMethod, string pUrl, string pJsonContent, Dictionary<string, string> pHeaders)

        {

            var httpRequestMessage = new HttpRequestMessage();

            httpRequestMessage.Method = pMethod;

            httpRequestMessage.RequestUri = new Uri(pUrl);

            foreach (var head in pHeaders)

            {

                httpRequestMessage.Headers.Add(head.Key, head.Value);

            }

            switch (pMethod.Method)

            {

                case "POST":

                    HttpContent httpContent = new StringContent(pJsonContent, Encoding.UTF8, "application/json");

                    httpRequestMessage.Content = httpContent;

                    break;

​

            }

​

            return await _Client.SendAsync(httpRequestMessage);

        }

}