BWPM/ConsoleApp1/Program.cs

using System;
using System.Net;
using System.Net.Http;
using MyModels;
using System.Threading.Tasks;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Web;

namespace ConsoleApp1
{
    class Program
    {
        static HttpClient client = new HttpClient();
        private const string URL = "http://localhost/CoreWebAPI1/api/";
        private const string DATA = @"{""object"":{""name"":""Name""}}";
         
        static void Main(string[] args)
        {
            //var builder = new UriBuilder(URL);
            //var query = HttpUtility.ParseQueryString(builder.Query);
            //query["ApiKey"] = "BgWSbwCNM3pEiCxgIlDEyD7HFpUgKPeL8OPDqH9nx";
            //builder.Query = query.ToString();
            //client.BaseAddress = new Uri(builder.ToString());
            var client = new HttpClient();
            string apikey = "BgWSbwCNM3pEiCxgIlDEyD7HFpUgKPeL8OPDqH9nx";
            client.DefaultRequestHeaders.Add("ApiKey", apikey);
           
            
           //client.PutAsync<User>(u)
            client.BaseAddress = new Uri(URL);
            var responseTask = client.GetAsync("user");
            responseTask.Wait();
            var result = responseTask.Result;
            if (result.IsSuccessStatusCode)
            {

                var readTask = result.Content.ReadAsAsync<User[]>();
                readTask.Wait();

                var users = readTask.Result;

                foreach (var User in users)
                {
                    Console.WriteLine(User.LastName);
                }
            }

            Console.ReadLine();


        }


    }
}