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Program.cs

using System;
using System.IO;
using System.Net;
using Newtonsoft.Json;
​
namespace ConsoleApp1
{
    public class ObjectJSON
    {
        public string Name { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var URL = "http://localhost/WebHooks/Webhooks/WebHooksConfiguration/0a152235-121e-4a20-b425-a2239011f0b3";
            var httpRequest = (HttpWebRequest)WebRequest.Create(URL);
            httpRequest.Method = "POST";
            httpRequest.Accept = "application/json";
            httpRequest.ContentType = "application/json";
​
            string obj = JsonConvert.SerializeObject(new ObjectJSON { Name = "Test WebHooks" });
            using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream()))
            {
                streamWriter.Write(obj);
            }
​
            var httpResponse = (HttpWebResponse)httpRequest.GetResponse();
            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
            {
                var result = streamReader.ReadToEnd();
            }
​
            Console.WriteLine(httpResponse.StatusCode);
        }
    }
}