Program.cs

using Simple.HttpClientFactory;
using Simple.HttpClientFactory.MessageHandlers;
using System;
using System.Net.Http;

namespace HttpClientFactory472
{
    internal class Program
    {
        //use static handler to reuse ports
        static HttpClientHandlerEx handler = new HttpClientHandlerEx();
        static void Main(string[] args)
        {
            for (int x = 0; x < 100; x++)
            {
                HttpClient client = HttpClientFactory.Create()
                //provide handler to factory
                .Build(handler);
                HttpRequestMessage message = new HttpRequestMessage(HttpMethod.Get, "http://www.google.com");
                var result = client.SendAsync(message).Result;
                Console.WriteLine(result.StatusCode);
            }
        }
    }
}