HttpClientHandler / HttpClient Memory Leak

Question

I have anywhere from 10-150 long living class objects that call methods performing simple HTTPS API calls using HttpClient. Example of a PUT call:

Answer 1

Using the repro form Alexandr Nikitin, I was able to discover that this seems to happen ONLY when you have HttpClient be a short lived object. If you make the handler and client long lived this does not seem to happen:

using System;
using System.Net.Http;
using System.Threading.Tasks;

namespace HttpClientMemoryLeak
{
    using System.Net;
    using System.Threading;

    class Program
    {
        static HttpClientHandler handler = new HttpClientHandler();

        private static HttpClient client = new HttpClient(handler);

        public static async Task TestMethod()
        {
            try
            {
                using (var response = await client.PutAsync("http://localhost/any/url", null))
                {
                }
            }
            catch
            {
            }
        }

        static void Main(string[] args)
        {
            for (int i = 0; i < 1000000; i++)
            {
                Thread.Sleep(10);
                TestMethod();
            }

            Console.WriteLine("Finished!");
            Console.ReadKey();
        }
    }
}