我如何说服Mono使用Tls 1.2或更高版本？

Question

我正在mono -V上运行单声道5.4（Mono JIT compiler version 5.4.1.6 (tarball Wed Nov 8 17:02:20 UTC 2017)报告CentOS 6.9 (Final)）。

它是使用http://www.mono-project.com/download/#download-lin-centos

中的说明安装的

我有一个使用Stripe.net与Stripe信用卡提供商交谈的程序。但是所有交易都会被邮件Stripe no longer supports API requests made with TLS 1.0. Please initiate HTTPS connections with TLS 1.2 or later. You can learn more about this at https://stripe.com/blog/upgrading-tls拒绝。

我编写了一个测试程序，看看mono是否正在使用tls1.2，其中包括尝试强制它执行此操作：

class Program 
{
    static void Main(string[] args) 
    {
        System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
        File.WriteAllText("howsmyssl-httpclient.html", new HttpClient().GetStringAsync("https://www.howsmyssl.com").Result);
    }
}

当我查看文件时，它说（除其他外）：

Bad Your client is open to the BEAST attack. It's using TLS 1.0 or earlier while also supporting a cipher suite that uses Cipher-Block Chaining and doesn't implement the 1/n-1 record splitting mitigation. That combination will leak information.

有没有办法迫使单声道HttpClient使用TLS1.2？