Csharp ASP.Net Core 3.1 HttpClient 不重用套接字

下面是我在Asp上运行的一段代码.net 4.7.2和.Net内核，但每个框架都有不同的行为

public class Program
{


    private HttpClient Client = new HttpClient();
    public static async Task Main(string[] args)
    {
        Program example = new Program();

        Console.WriteLine("Starting connections");
        int numberofIterations = 10;
        Task<HttpResponseMessage>[] awaitableTasks = new Task<HttpResponseMessage>[numberofIterations];
        for (int i = 0; i < numberofIterations; i++)
        {
            var httpRequestMessage = new HttpRequestMessage();
            httpRequestMessage.RequestUri = new Uri("https://example.com");
            httpRequestMessage.Method = new HttpMethod("GET");

            awaitableTasks[i] = example.Client.SendAsync(httpRequestMessage);
            //Console.WriteLine(result.StatusCode);
        }

        Console.WriteLine("Connections done");
        await Task.WhenAll(awaitableTasks);

    }
}

用这个.Net核心框架，网络跟踪 for each 请求显示一个单独的tcp连接，同时使用ASP.NEt 4.7.2框架套接字得到重用.

Network Trace .Net Core

Network Trace Asp.Net 4.7.2

欣赏你的 idea ，理解差异，解释这种行为，以及克服这个问题的最佳方法.